Regarding WWE SmackDown possibly moving to Thursday nights, a WWE source confirms their official statement from Wednesday that the move is being considered but no decision has been made. With the fall TV schedule needing to be put into place, the decision on SmackDown will be coming very soon.
As of yesterday, Syfy had not locked in their fall schedule yet so while it may be hard to believe, it's very possible that someone in WWE "jumped the gun" and had the production trucks painted without the official announcement.