Lordaeron PTR

I was online like 1h ago on horde side and there was 10 ppl, online now I try to log into Lord PTR and it says 300 ppl in que?
how is this possible, I doubt so many ppl are online there or is this some kinda a bug.

And I asked an friend of mine who is on the PTR right now and he says there is like 20 ppl online.

It was a bug, developers were most likely testing related stuff since that is what a PTR is for.
It is now fixed.