really, it's not like any one group "owns" a specific series...

you see a lot of overlap for a lot of reasons .... the most prevalent one is simple desire to do a series. Example: AnimeOne wanted to sub Chrno Crusade. So did 10 or so other groups. This had nothing to do with who else was subbing it, we just wanted to see it done.

Sometimes groups will talk among each other to prevent some of the duplicated efforts... but sometimes they don't.

As far as names and translation styles go, well .... with names, there's often no "official" spelling. So Kagari uses the same phonemes as Cagalli, and Lacus and Lux and Lex are all equivalent too. Lavie and Ravi and whatever else are the same. Basically until the official website gives character bios with english spellings, no group can claim their spelling is "correct" unless it somehow happens to appear in the video later in the series somewhere, and even then "official" names and spellings can differ from what appears in the video, because the animators and authors and artists don't always have particularly sharp english skills either... (see ROD-TV's "Rocked" instead of "Locked" as an example).

So, spellings and styles are impossible to get right consistently (most of the time) and different groups don't usually care too much who else is doing something. So yeah, you'll see duplicated efforts, inconsistencies across groups, etc. It's part of the fansub gestalt, so get used to it [img]i/expressions/face-icon-small-wink.gif[/img]. If you really want consistency, especially in a long series, buy the r1 dvds and hope the dvd company is consistent (they usually are). Otherwise .... just gotta put up with it.