That's strange, when I calculate the seed C643C8E32E33C473, the Initial PIDRNG Frame is always 56, even with the memory link box checked. Even so, it's strange that it's treated like you have used memory link on your games, I haven't had this occur personally yet, so it's likely something specific to your games.
I have two games. It happens on both. Neither have even connected to a BW1 game through Union Room, nor Dream World. They haven't even connected to each other. Either something very weird is going on, or there's more to the RNG on this than has been discovered thus far.