How does server become full while you are already in queue? (1017 after queue?)

[VeriferVenti]

It's probably the server thinking it has room in the queue but really doesn't. Or it overbooks thinking some people will drop but then not enough do, like how planes work. When servers are under this much load weird things can happen, it's a surprise they haven't crashed.

So you're saying it continues to operate under the same logic that SE did when they originally calculated the number of servers required for launch?