L.R.
My daughter is 10 and we've never had the experience of having neighbor kids she played with; all the neighbor kids are younger than she is, by several years, and all go to a different school to boot. So we've had to do something you may find yourself doing more now -- more phone calls, arranging and chauffeuring to get to new and different play dates away from the neighborhood.
I think you will find that this does indeed, as you say "eventually hash out," and then it will, well, re-hash, over and over. Kids' best buddies of the week, or month, or whole school year, do change, rotate and mutate.
The girls who are playing together a lot right now might end up not seeing as much of each other in a few months, and your daughter might end up seeing more of one of them for a while.
Or the other two girls might have more in common than you realize right now (maybe they both go to the same dance class, or are on the same soccer team, or just like to play the same kinds of things in the same way and thus are attractive friends to each other). That's life. Neighbor pals are great -- and easy -- but your daughter is hitting the age when being geographically close, and even having played together a lot as younger kids, counts for less and less, and common interests or personalities/play styles that "gel" start to count for much more. I see it all the time.
Try not to feel offended or hurt when you think your daughter is "snubbed" or not "one of the top 10" (your terms, both). It's not kids intentionally snubbing; it's probably kids' shifting attention spans for other kids, frankly. Invite the kids over whom your daughter wants to play with; don't invite the one she doesn't want to play with. And explore play dates with newer friends she knows through school or other activities she does outside school. This is going to be fine; it's a normal transition from neighborhood friends to a broader circle where there is friendship based more on interests and less on proximity.