Sorry for the delay on this @itonewbie. It appears that this is inherently a program limitation. The program, as you had described, does not prorate the depreciation amount if the taxpayer did not use the property for more than the greater of 14 days or 10% of the days rented at FMV. Depreciation and any interest that flows to the Sch A would need an overridden in this case.

While I realize program limitations are not ideal, I've submitted some feedback to our development team, so perhaps this feature/calculation can be improved upon.