This is quite mysterious.
While your scores of the last six weeks don't come any close to your average, some numbers in your stats indicate some other influence:
- your total scores number is 404 - quite a lot.
- you played no match play - no influence from there.
- your best 9 hole score is 29 (= 58 for the average),
- your best 18 hole score is 61.
Thus, unless these good scores come from Par3 courses, you have had your moments which shine through your average.
As a Master, the best 40 scores (ranked rounds) combine to the average. They may be hidden in a pool of Master scores but they may pile up, and don't go away.
For clarity, all your Master scores would have to be available.