Fp+ park hopping

I am sure this has been asked but i cant find it so… here we go again. I have 2 FP+ reserved in AK and plan on hopping to HS later in the day. My question is once i use my second in AK can I immediately make another in HS (assuming what i want is available) or do i have to “burn” up my 3rd in AK before i can get one in HS?

The minute you scan your second one you can make a FP at another park. It no longer makes you book 3.

But you can’t use 2 in one park and book the 3rd in another park right? But can once the 2nd is used?

Correct- you have to wait to pick the other park.