Quick question

I didn't hear any objections from the Obama campaign when Pennsylvania first set its primary for April 22.

Now that its time to vote is slowly approaching, Obama wants to end the contest before they get their say. Why was a late primary fine until it came time to hold it? They could have said something along the lines of "April 22nd is too late...you may want to set it earlier so the Democratic Party has time to 'heal'". Why didn't they?

Bonus question: Is the Obama campaign going out of its way to piss off the key states that the Democratic side needs in November, such as Pennsylvania, Michigan, and Florida? There's no way to get to 270 electoral votes without 2 of those 3 states...