This is why time travel stories were to be avoided. Of course it is possible (and honestly should be true) that Xavier has no idea what he is doing playing with time like this and it would not work. On the other hand, at this point I just feel like everything going on with this is being made up as the story goes without any care to rules previously implied or even presented in this story itself. So no sense thinking too much about it, the story seems much more emotional than scientific.
The 'team' in PoX did not last long either.I doubt this one is a misdirect. There was nothing in the solicits for this team outside RoTPoX 1