If you have a sticky throttle, do NOT drive the car. It may very well stick wide open.
It takes a very patient person to get the plat back in. You must remove the TB from the car and work it open and closed manually. Sometimes you get it right away, and sometimes it takes a few tries. The best way is to get it close, and get the screws just BARELY tight, so the plate can 'shift' a bit in the shaft as you open and close the throttle. While you do this, hold it up to the light to determine if you have much light showing around it. You shouldn't have much. Any light means air leaking, and your IAC may have a hard time dealing with your idle. If the leak is around the circumference of the throttle plate, the MAF sensor won't even get a good read of it.
If you still have problems, try flipping the plate AROUND 180° or flipping it OVER. It'* really only designed to go one way PERFECTLY, and should be marked if it'* ever removed.
I don't suggest removing the plate for TB cleaning. I only remove them to shave/modify TB'* for other members. Then I loctite the living snot out of the screws so they can't move.