I am targetting 1 spawn, typing
Then targetting a second spawn and again typing
and when I type
the new spawn location group is splitting the 2 spawns at 66/33, when it should be 50/50. Shouldn't it?

I *think* this might be caused by the total=1 init value.

In WorldDatabase::SaveCombinedSpawnLocation, we init int32 total = 1, then total++ it as we iterate through everything that's been added.

If it starts out as a 1, then bumps to a 2 when the first NPC is added, then we add the third and it's now 3, then yes the first spawn does appear to have 66% and the last one 33%.

I won't even ask what happened to that last 1%

Should be fixed.