Losing clones

I am running into a small problem that seems to be random. Sometimes when I hearth or release my spirits after a wipe I won't be able to see all of my clones on my main. Likewise sometimes the clones won't be able to see the main. If I logout then log back on it fixes the problem. I was wondering if anyone has experienced the same thing.

I am using 1 computer to do all five instances of wow
Specs on the comp are
Intel 6600
4 gb ram
8800 gts
2 seagate baraccuda drives (main on c: clones on d:)

Weirdly this question arose in software too and was answered here

it is a Blizzard network sync issue.... relog on the toon that can't see the others.

Thank you for that. Apparently my search skills aren't what they used to be.

Yeah, I only really have this problem when summoning or rezzing or portaling on the same continent. Annoying, ain't it? :P