camp rules

[Zubek]

Can anyone help me clarify the rule of a camp?

I was camping sisters in Lfay, went around the corner to sell to the wood elves. I came back and my camp was still empty and had not respawned. A necro was there and told me it was his camp now because I left and proceeded to KS the sisters from me until I left.

The whole time the north bandit camp was open and I finally got tired of fighting over 4 mobs and just went and camped them.

Was I right in saying it was still my camp? Or was he right in taking it because I went to sell to a vendor a short distance away?