Um, my understanding is that Mino is the strongest of the cycline type antibiotics and use of that also gives a person sensitivity to sunlight. In fact, ALL of the antibiotics give out more sensitivity to sunlight and advise you to wear hats, sunscreen, and don't tan inside or out etc.
I don't think your doc should have changed your prescription if you were clear - and at your check up, you doc should have seen that the mino wasn't working for you.
I went off Mino cold turkey too - I was taken off because it caused any acne to eventually turn into ashen grey colored spots on my face so my doctor then put me on Doxy. Tetracycline is the first line of defense usually, then Doxy, and Mino is the big gun.
I dunno.........you either need to go back to your doc, and complain that you've been on mino for a year and nothing has improved, or you need to go to another dermotologist.
I have been to 4 separate doctors at some point about my acne and now it's finally cleared up.