Possible Refinance Scam

[Kane Rickman]

I need some advice here on a refinance I am going through currently and to see if it could be a scam.  

I’m going through a broker whose number I received from the mail on a streamline refi letter.  He has been very easy to work with except he says a lot of confusing things and is hard to follow.  Anyways it’s been about 40 days and we’re set to close in two days.  We’re meeting a notary at a Starbucks and are told to bring our checkbooks because he’s not entirely sure how much we will need to pay yet (somewhere around 900 dollars which is way less then the  original estimations which was 1500)   I’ve been told we don’t need to pay our mortgage payment which was due on the 1rst of febuary..  Should I be worried? And how can I figure out for sure I’m not about to get scammed and lose 900 dollars and miss a mortgage payment? 

Thanks for your input!