During loan mod, which mortgage amt to put for payment?

We had our original loan amount, then received the 1st loan mod payment trial period, and just last week received a second loan mod trial period payment. Which one should I put??? The second loan mod amount is almost 1,000 lower than the 1st loan mod amount. I just worry I'll put the lower amount and it'll get denied and bumped back up to one of the first two original payments.

Our lawyer said we put whatever were contractually obligated to pay.

We received a temporary loan modification from Citi Mortgage thats goes through January 2010. Our payment is now $155.66 less per month, but we still use the original amount because the modification is only temporary.