The game must have felt that the temple was a piece of crap and seems like it spawned a few new chunks that have overwritten the temple at several places to enforce it's opinion. (or maybe it couldn't handle it's awesomeness )
I don't know if that's normal behaviour in the game or there's some testing going on by the staff.
Just to let you know, you're off to a dead end in the Oasis temple.

I must say, I feel more lag the last couple of weeks. lag that e.g. throws you 10 blocks back or blocks that you must mine twice. Maybe one is connected to the other?

I'm not going to rebuild it, too much work to do twice, it would compromise my laziness. (even if it was in creative)

You win some, you lose some, now I'm off to sob in the corner of my room...

All foolishness aside, just a heads up to J or one of the other server superhero's, maybe there's something going on in the small world server that isn't like it should be.