Backwards model for land bridge origin is badly broken.

[isaacovercast]

Oh crap, i just realized i'm doing something dreadfully stupid with the land bridge model. Instead of tossing all lineages back into the regional pool at time 0, they are all being forced to coalesce and return as 1 lineage. It's essentially acting like a volcanic island model with just a ton of different colonizers at time 0. FUkc!