Purchase 2:3 aspect for each collage?!

I went ahead and bought the in-app purchase to use the 2:3 aspect (to print as a 4x6 photo) for 99c, same cost as the app itself. Thought I was buying it for future use too, but no! Seems I have to pay a dollar for each collage I want as a 2:3!? Total ripoff.

KKC1919 about Diptic, v8.0.3