Webvention (which is really one guy Dan Abelow) was the company which originally filed the patent. IV/Lodsys bought the rights to the patent from them (him). Note this is how IV gets their patents - they purchase them from existing patent holders for the most part.
The confusion seems to be that Apple actually licensed the patent from Webvention, not Lodsys and that license would transfer with the sale of the patent rights. From this filing it looks like Lodsys hasn't read the existing licenses which transferred over, which is a bit absurd.
