Good point, although it does raise a few time paradox issues...let me elaborate:
1 - The very action of painting the future affects it (for example Issac's painting of Peter below the highschool banner, Peter wouldn't ever have gone there if he didn't know it had to happen)
2 - How much can he predict things and how much are they self-forefilling prophecies? (Issac's painting of a woman being hit by a bus so disgusted her she fled the gallery and got hit by the same bus)
3 - Can he direct them or is it convinient that this time they coincided, appearing as if he managed too...he did paint where Peter was but he also painted himself and Simone(...which in a way included Peter but not really)
4 - If no-one saw his paintings would they still happen, with the exception of his very early drug induced work lots of people who are in the paintings have seen them
5 - they are all open to artistic interpretation by their very nature...I thought it was claire dead on the floor in his cheerleader series...does a small model blow of NY city blow up or does someone dream about it?
Just my thoughts put to paper...

very confusing even for me...I'm exhausted
