It is common for the expense amounts from the previous year are different. Insurance rates could have gone up or down and Real Estate taxes also could have changed. There could have been supplemental property tax (which doesn't happen often) last year.
I recommend going back and checking your records to confirm your amounts.
And to be sure you don't miss anything, here is a link with common rental expenses you can deduct: What kinds of rental property expenses can I deduct?
