Crooked Bed

Our 1st time to Bagg a vehicle period. (and no help from a pro )So bear with me..
Me and My brother just bagged  a 95 S10 and everything went good but on the bed we cut the tire section of the bed( a lil too much)  and where the axle goes through..I plan on tubing it here soon but for now the bed sits  crooked and i was wondering if its because there is not enough support to keep it straight or is it the frame not even..
We dont think its the frame....
I was just wondering if this has happened  to any of you guys?
And anything else u can suggest for us rookies?

the rear of the frame has sagged down.

But how? bad welds or what?Is this common?

PICS?

Its just too much weight on the back of the bed alone.  Before the weight was spread from the front to back and fully supported.  Its not a big problem, just make sure to brace it well when you do the bracing later.

Did you guys notch the frame?

Did yall brace the rear of the frame in anyway when yall were cutting it up? 

How did the notch get done? like james said the frame sagged a little...  you got pics??

cant help without pics.............................. really good guess's though.... can be an easy fix so dont stress about it. need pics though