Actually Critter, the situation is not unusual at all. Even CPAs do it the way the program is designed to do it. One of the reasons for that is because the form 4562 only has allowance for one conversion date. So if you converted in the same year from rental to personal back to rental, you don't show any "conversion" at all. You just declare the number of days of personal use while it was classified as a rental.
But if I may ask
@James why was it personal use for 7 months? If you did not live in the house during that time, there is no need or requirement to declare that time as personal use. Were you doing major renovations maybe?
