Okay, thanks! Give me a few minutes to look it over for you.
*edit*
I see a few things in your contacts for Amy, Mom, Veronica, Ashley and Sophia.
Have you heard Ashley and Veronica in the bathroom on Saturday morning (not sure of the time)?
Also, Your hints show that you need to drink with Amy at Club Neon. Approach her at the entrance and have a drink with her (I did this 5 times so far and wasn't able to trigger her telling you about "The Vault" yet).
I'm also seeing that you still have to do the beach scene. As of right now, you can only "Check on Ashley" or "Check on Mom". Do both, which means you'll need to do the beach scene twice (on Sundays at 9:00).
For the beach portion, first invite Sophia (Check on Mom), then the next Sunday invite Emma (Check on Ashley).
I'll keep looking to see what you need to do to trigger The Vault.