The article seems like it's part of the Celtics negotiation. Like they were trying to buy a used car:
"We are interested in him, but he has a few warts that we're concerned about. How about I make you a solid offer and leave it on the table."
The Celtics are reportedly frontrunners for him, but the offer hasn't blown Philly away they're not in a rush to trade him (they probably gave themselves an arbitrary deadline of training camp) and will continue to field offers in the meantime. Until they find a better offer, Danny will be waiting.
Instead of those incidents, I would investigate his work ethic. If that checks out, the off the court stuff will be a non issue.