"Hard" puzzles harder than they need to be

Found a two move mate, but dumbfounded that it was not accepted, I searched for a few minuets to see if there was any possible way I could be wrong. It was in fact secure, but playing along with the app I was forced to checkmate 4 moves later. The app should detect if you found mate and not be limited to its exact framework. A tactics app that allowed any move as long as it lead to a solution would be great, but for the sake of time I know these developers should just specify which rout you should take by captioning each puzzle (i.e. Mate in 4) so that I dont look for a mate in 2, find it, and then give a bad review--deserved because such a tactics app is counterproductive because it trains its users to use bad chess strategy!

r3boys about Chess Tactics Pro (Puzzles)