OK, can't be entirely sure what setup you were going for with these cuts, but it appears as though the last 4 point sets are all related to the headphone output. I have shown in the picture.
I don't use my headphone bits, so can't comment on potential problems.
Was the weird behaviour you had with using the headphone ?
The other thing you could do to test the damage, is remove all your soldering from all 8 points, and test.