Thank you for the post.
I was able to replicate this on both Mac OS X 10.7.5 and Windows 7 running FileMaker Pro 12v3. This was also the behavior in FileMaker Pro 11. I have forwarded your report to Development and Testing for review.
For More Information see: Open from Manage Layouts ignores the layout View settings
This is one of many acknowledged bugs that can be found in the Known Bug List thread here in the Report an Issue section of the forum.
It can also be downloaded as a database file from: https://www.dropbox.com/s/jt09b82i0xijbu3/FMP%20Bugs.zip
Thank you for linking the previous report.
Because of your diligence in linking these together, I was able to find the original report and have added this one to it.TSFalconFileMaker, Inc.