I (almost) ignore the punctuation altogether on these exercises - there is enough to learn, and trying to match the punctuation distracts from learning language. 

If the students are presented with the same exercises other subscribers see, these are self-scored, and whether to 'count' punctuation, or anything else such as minor typos or even real spelling errors, is 'own choice'. 

There is no "score". The differences to the preferred answer are pointed out to you so that you can self-assess yourself.