Some of my friends brought this up before, but if you look at where both festivals are they're both fairly close in location to each other. It's very likely that a band could play Friday at one, hop on a plane, and be playing Sunday at the other. Stuff like that has happened before. The ones that match up with both festivals have been rumored for awhile to be at Lolla (I think since February) so I think (with this second list coming out a couple days before the official announcement) that factor was taken into account.
Just my theory though. We'll find out soon enough.
Yeah I hear ya, that'd be awesome if this is the lallapaloza line-up, it would easily make it the best festival this year, easily - would just make me some what mad because I already planned and booked a trip to Canada for Osheaga ahah but I digress and hope for other peoples sake a festival this kick ass will happen