@Graphite some suggestions
1) you do have a number for September for both the balance and the interest. Look at your closing / settlement statement. That interest is deductible. And the opening balance is the end of September balance. Just because it wasn't reported by the mortgage service doesn't mean it's not deductible.
2) Since you rented out the 1st home effective November 1, the interest is deductible on Schedule E and not Schedule A. You are better off that way. The November and December balance and interest expense should be ZERO. And then on Sch E, you can deduct the $3153 and the $3148 (separately, same thing for the property tax - 2 months can go on Sch E).
repost again and let's see what it looks like. you should be better off because of you can deducft 100% of the $3153 annd the $3148
