[DBurgdorf]

Two questions: First, what size house are you in, and second, are you trying to check the vault from your own house or from someone else's?

I tried with one of my chars to check from an alt's house, but saw no extra slots; it wasn't until he actually went to his own house and checked there that things got updated and I saw his extra vault slot.

And since three-room houses have three house vault slots, it's possible that two-room houses still just have two (as do basic inn rooms).

-- Darryl (Milquetowst)