What is the landlord gaining?

A week after moving into our rental we began to get visitors from the landlords mortgage lender. Then we got certified letters notifying us of a trustee sale in 2 weeks. The landlord denies this. He says he is paid up through Jan 1st 2011. The trustee says no that they have verified with the lender they represent and the loan has not been reinstated. The landlord says he will get us proof but so far nothing. We have put this months rent in an escrow account and he says that is fine because he will get us proof....should we believe him or the trustee? Is there any reason the trustee would not have correct information?? The home still shows as up for sale on 12/23/10 as of this morning and he says this is incorrect.