and it was warped like it was bent concave... not supposed to be like that is it?

do fender pickguards usually come completely level?
It should not be like that. If you buy it from a shop or somewhere else it will be level.
Quote by RHCP94
It's an option for the "Which one of E Daws parents are uglier?" thread.
I suggest contacting the person you bought it from.

If not, then it will probly just go back to a flat shape then you screw it in. Just DONT GO TOO FAST, go slow and screw evenly on each hole.
Sell it to some other loser.

Im not saying your a loser.