Cash Flow Loan Amortization Schedules

[sduttonusa]

I purchased a Cash Flow Loan Amortization Program so that I could track my business's loans / payments . . . my tax preparer has been doing this for me through the years. I took the time to enter all the events from 2005 to 2014 into my new program, printed out the schedule, and then compared my schedule to my accountant's schedule. Every single event's principal / interest / loan balance amount matched up perfectly between the two schedules covering about 10 years . . . all except one. There was one event in 2011 where the amounts were different by about $36 (which is probably what an additional day would have produced). Using a third program from a friend, I validated my accountant's numbers. Now I could be wrong, but it seems that the amortization program I purchased is miscalculating the number of days for the last six months of 2011. I don't know what else could be behind this? I mean, how is it possible that the mathematical calculations of dozens of events over a 10 year period from two different financial programs match up perfectly, all except one? Any help would be appreciated.