You are correct that the credit for a heat pump is allowed for secondary residences. Some of the other energy credits can only be for a main home (insulation, doors and windows).
The developers have the form screwed up (Form 5695) so it is forcing question 17 to be answered and incorrectly applying that answer to the bottom part of the form (heat pumps, etc.).
It is almost certain it will be corrected at some point, but I have no idea when it will be fixed. It could be fixed this week, but I suspect it will take longer than that.
