I'm unsure of the actual lore, but I think most people accept the headcanon that Seeker tribes have different sects. With the amount of Seeker RPers (which is already pretty conflicting with the Seeker lore, since they're supposed to be small in numbers) and each tribe only having a few Nunh's at most, things get confusing otherwise when you have two dozen Nunh RPers from one tribe. Not to mention, things would get pretty incestuous otherwise, and just make RP backstories difficult.
As for being adopted by Lalafell, it's possible (though you'd have to ask yourself why she would be adopting a Miqo'te, particularly in a society where mixed race relations seemed to be frowned upon) and plenty of people do it, but because so many people do it, it's become something of a cliche in the RP community.
As for being adopted by Lalafell, it's possible (though you'd have to ask yourself why she would be adopting a Miqo'te, particularly in a society where mixed race relations seemed to be frowned upon) and plenty of people do it, but because so many people do it, it's become something of a cliche in the RP community.