Is warped stab affecting my flight?

Good Morning. I have been pondering over a situation involving my
Global Right Flyer, which features a covered, flat-rib stabilizer. Last
Sunday, under somewhat gusty wind conditions, I had a tough time
controlling the plane. I had to constantly give it Up Elevator and
occasionally Right Aileron to maintain a steady flight, and I could not
properly trim it. I did manage to land the plane close to the runway,
but only onto a flat-grass area across the runway from the pilot station
area, and the prop broke upon landing. No other damage to the plane was
noticed. When I got home, I checked the plane some more, and discovered
that the stabilizer was partially warped! The right half of the stab
was true and level, as was the center of the stab, but at the left tip,
the leading edge was higher than the trailing edge! I had never seen
this before, even though I have been flying this plane about two months,
so I have no idea how long this condition has been present.
Two questions:
1. Could this warping have affected my flight?
2. How can I correct this warping?
Any answers, particularly to (2), would be appreciated.
Thanks,
Harry Sanchez