The sort by name option in DataTools/SSIS 2012 does not appear to work correctly any more.
For example:
Initially the sort by name option works:
But after doing a Save-All/Close Solution/Re-open - it's back at the state in the first screen shot.
I first noticed this in a very large solution and thought that TFS may have something to do with it, however this test package I have created and in the screenshots above is not included in any version control.
Even if I create the packages in the order I want, say creating A Package, then B Package, then C Package, and on and on, it'll be sorted in order when I save, but when I re-open the solution it's in the reverse order of what it was previously. So, it appears that the sort by name is NOT working, and that while the sort order used in the IDE is created datetime ascending, the sort order when you re-open a solution is created datetime descending.
All in all, it makes it rather difficult to have any sort order within an SSIS solution in 2012.