That sounds like success Docker, you have taken actions that should have fixed both of the underlying problems. Incidentally, it sounds as if the speed control lever or the governor plate had become bent downward due to a mishap along the way. By straightening it you have put things back the way Briggs intended them to be.
The Briggs 2 stroke engine, which was designed and manufactured by Komatsu, seems to have been quite a good engine. There are two or three other Japanese 2 stroke mower engines which are approximately equally good, but were not sold by Briggs and Stratton.
Since your problems are cured, I'll close this thread. If any member wishes to post to it, just send a Private Message to a moderator.