This is unfortunately a common problem with the Vault and updates it seems, I’ve been in circles with Epic on it.
FYI there are two different Projects that get “Created” from Mobility 2.7.
If it is 4.15(the native version) or 4.16 it installs the version with all the Blueprints. (I haven’t tested 4.17 yet)
If it is 4.10 - 4.14 it installs a Project that only has the new animation assets, no Blueprints. That is the way Epic has it set up and how we need to deliver them to be compatible with the range of engine versions.
That’s how it’s SUPPOSED to work, but that may be another variable which the Vault is not quite getting right. The old “animation only” Project may not be getting purged and re-cached properly and you are getting the old stuff.
Just a hypothesis, but maybe similar. Anyway please clear the cache again, try different engine versions, etcetcetc. Epic did not have an answer for us why these issues keep happening, sorry about that. Let us know if you succeed.