tlmgr経由でTeX Live 2013の構成のまま、TeX Live 2013からTeX Live 2014 frozen, 2015 pretestへ更新されちゃった件

$ sudo tlmgr update --self --all
TeX Live 2013 is frozen forever and will no
longer be updated.  This happens in preparation for a new release.

If you're interested in helping to pretest the new release (when
pretests are available), please read http://tug.org/texlive/pretest.html.
Otherwise, just wait, and the new release will be ready in due time.
tlmgr: package repository http://mirror.ctan.org/systems/texlive/tlnet
[1/2, ??:??/??:??] update: texlive.infra [203k] (32920 -> 35898) ... done
[2/2, 00:01/00:02] update: texlive.infra.x86_64-darwin [230k] (29809 -> 33484) ... done
Restarting tlmgr to complete update ...
TeX Live 2014 is frozen forever and will no
longer be updated.  This happens in preparation for a new release.

If you're interested in helping to pretest the new release (when
pretests are available), please read http://tug.org/texlive/pretest.html.
Otherwise, just wait, and the new release will be ready in due time.
tlmgr: package repository http://mirror.ctan.org/systems/texlive/tlnet
[ 1/39, ??:??/??:??] update: bibtex.x86_64-darwin [68k] (29879 -> 34201) ... done
(snip)
[39/39, 00:33/00:33] update: xdvi [7k] (30339 -> 33736) ... done
tlmgr: package log updated: /some/where/texlive/2013/texmf-var/web2c/tlmgr.log
running mktexlsr ...
done running mktexlsr.
running updmap-sys ...
done running updmap-sys.
regenerating fmtutil.cnf in /some/where/texlive/2013/texmf-var
running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine luajittex ...
done running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine luajittex.
running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine luatex ...
done running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine luatex.
running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine tex ...
done running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine tex.
running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine pdftex ...
done running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine pdftex.
running fmtutil-sys --no-error-if-no-engine=luajittex --byfmt mf ...
done running fmtutil-sys --no-error-if-no-engine=luajittex --byfmt mf.
$ 

$ tex --version 
TeX 3.14159265 (TeX Live 2014)
kpathsea version 6.2.0
Copyright 2014 D.E. Knuth.
There is NO warranty.  Redistribution of this software is
covered by the terms of both the TeX copyright and
the Lesser GNU General Public License.
For more information about these matters, see the file
named COPYING and the TeX source.
Primary author of TeX: D.E. Knuth.

$ sudo tlmgr update --self --all
tlmgr: package repository http://example.com/tlpretest/tlnet
[1/2, ??:??/??:??] update: texlive.infra [207k] (35898 -> 37344) ... done
[2/2, 00:00/00:00] update: texlive.infra.x86_64-darwin [249k] (33484 -> 36831) ... done
Restarting tlmgr to complete update ...
tlmgr: package repository http://example.com/tlpretest/tlnet
[ 1/35, ??:??/??:??] update: bibtex.x86_64-darwin [68k] (34201 -> 36892) ... done
(snip)
[35/35, 00:08/00:08] update: xdvi [7k] (33736 -> 37078) ... done
tlmgr: package log updated: /some/where/texlive/2013/texmf-var/web2c/tlmgr.log
running mktexlsr ...
done running mktexlsr.
running updmap-sys ...
done running updmap-sys.
regenerating fmtutil.cnf in /some/where/texlive/2013/texmf-dist
running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine tex ...
done running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine tex.
running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine pdftex ...
done running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine pdftex.
running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine luatex ...
done running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine luatex.
running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine luajittex ...
done running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine luajittex.
running fmtutil-sys --no-error-if-no-engine=luajittex --byfmt mf ...
done running fmtutil-sys --no-error-if-no-engine=luajittex --byfmt mf.
$ 

$ tex --version 
TeX 3.14159265 (TeX Live 2015)
kpathsea version 6.2.1
Copyright 2015 D.E. Knuth.
There is NO warranty.  Redistribution of this software is
covered by the terms of both the TeX copyright and
the Lesser GNU General Public License.
For more information about these matters, see the file
named COPYING and the TeX source.
Primary author of TeX: D.E. Knuth.

$ sudo tlmgr update --self --all
tlmgr: The TeX Live versions supported by the repository
  (2013--2014)
do not include the version of the local installation
  (2012).

  # we allow a range of years to be specified by the remote tlpdb
  # for which it might work.
  # the lower limit is TLPDB->config_minrelease
  # the upper limit is TLPDB->config_release
  # if the later is not present only the year in config_release is accepted
  # checks are done on the first 4 digits only
  # Why only the first four places: some optional network distributions
  # might use
  #   release/2009-foobar
  # If it should work for 2009 and 2010, please use
  #   minrelease/2009-foobar
  #   release/2010-foobar