I Glitched Out Into The City When I Joined The Game?

[The Arena Master]

So, I saw a server that had like 5 seconds left, and I joined just in time, when all the sudden I was warped into the starting spawn point. It was really weird. How did this bug happen?
Here are two photos of it:

 

[Jtzink]

Probably a lag issue... I've broken a block and fallen into the city many times.

 

[The Arena Master]

No. I don't think you understand, the Survival Games was active and I was still in the city. You can see that in the 2nd photo.

 

[Firedog150]

How did you get all of the items?

 

[The Arena Master]

Chests. They automatically generate the items just like it does in Survival Games.