I agree, if it was a shirt pull fair enough but they just got in each others way, happens all the time in a penalty area and shouldn't really be penalised unless it stops a clear goal scoring opportunity. They should have had one in the first half though so, I guess it evens out.
Yeah there is basically no way that is a penalty and if you remove contact like that from the box on a set pieces then you are either going to have loads of pens a game or loads of goals from set pieces as it is impossible to stop someone running and getting a leap on you without blocking them off