Tough spot considering that they should have provided the notice but also on your end for not looking into it prior to your lease being up. I would speak with them and make it clear what it said in your prior agreement and ask they extend the current lease rate for the time period while you determine if you wish to continue living there.
This document looks helpful:
http://www.lsnjlaw.org/publications/...antsrights.pdf
Check out page 22 and on. Page 24 talks about proper notice provided by tenant and renter.