We know what you mean.
There was - a lot - of testing and though that went into all the different possible flows of registration, logging in, re-connecting, etc. in addition to the different possible registration modes of JFBConnect.
I wouldn't be surprised if we try to spell out the different combinations of functionality in the future.. JLinked is still very new (we haven't promoted it at all yet.. that's starting very soon), so right now, we're mainly getting feedback like this from our users to determine what could be improved in both features and documentation.
If there are any specifics that you're still not sure about, definitely let us know, and I can try to clarify now. Either way though, thanks again for the feedback, testing, and confirmation that it does all work as we anticipated. So far, we haven't heard of any big issues (1.0.1 did fix a few minor issues), so in general, we're pretty happy with the foundation of JLinked to start growing it from here. Obviously, JFBConnect is already very solid, with more features to come in the 4.1 release later this month.
Thanks again, and good luck,
Alex