Kinda like our previois deals for David West, Josh Smith, DeAndre Jordan and Bledsoe, etc.
Just because a trade gets plastered all over the media, does not by any means mean it's "as good as done".
It could be as simple as a deal has been discussed by both parties, both sides have high interest, but they are still a ways off from reaching an agreement. Minnesota may feel that Love is a superstar and hence might be expecting way too much back in return. On the other hand Boston might not think he is worth THAT much, and may be trying to offer a more reasonable deal which, in the Wolves' eyes, is highway robbery. It may well be that neither team is really willing to budge from where they stand.
Same thing happened last season. The Clippers wanted Pierce and KG, but but didn't believe that a couple of draft picks was fair value for two guys of such legendary status. Ainge wanted Jordan and Bledsoe or no deal, and no way clippers were willing to give both of those guys up.
It's probably the same deal with Love. The Wolves are probably asking the Green, Bradley, Sullinger, Olynyk and multiple draft picks, but Boston knows that if they give that much up they'll have no team, without
without Love..so they're pushing back. Our the Wolves want Rondo as a part of the deal, but Ainge won't deal him because his aim is to play Rondo and Love together. Our Wolves want Rondo but he's started that he won't re-sign if he goes to Minnesota.
There could be any manner of complications holding back a potential deal, and Ainge may not want to offer too much if he knows that Love will be a free agent soon, and that Boston will have a good chance of signing him outright.