No, I don't think your character are being pushed out, atleast not by me, the other conversations like between Tylr and Cyrix might have confused things.
I thought you had figured it out when Diver addressed the others in the last post. The group I'm with, with Cyrix, Tylr (and Pterano and such), Ducky, Petrie, Kit, Cory and...I think after that's it's just your characters. Not sure on that point. It's a big group.
Anyway, I had Ducky back up what Diver said last, if that helps to show.
There's only two groups heading to the Valley as of now.
GROUP 1 (that's only partly a group)
Littlefoot, his mother, grandparents, and now Topsy, and Cera, plus Kaga
GROUP 2 (not near Group one)
Basically everyone else.
Cyrix, Tylr, Cree, Pterano, Petrie's mom, Mim, Mia, Rhyn, Diver, Ducky, Petrie, Kit and Cory...I think that's everyone.