That cort plate was attached by the owener.
You say the tripod stem is too short, then you say the hole is too short. That is puzzling.
Some tripod heads have an added screw under the plate, by which one can control the lenght of the screw protruding obove, thus adapting for a too short hole.
The way for anyone to tackle such issue is to attach something between camera bottom and the tripod plate, this may be as simpla as a piece of cardboard, like a beer-mat/coaster.