MRIs aren't perfect.  Given you are sure there is something wrong, a second opinion seems very wise, make sure it's a knee specialist and that you get all your records and images from the current doctor.  Was the mensicus repaired (i.e. sutured) or trimmed, might make a difference

Good luck

I would have to agree with the getting a second opinion. I had a torn lateral meniscus and had it scoped in april of this year, and they found the medial meniscus was torn also, even after the mri showed a small tear in the lateral meniscus. I still also had laxity in my plc, and when it started getting worse, my os said that the laxity was from the meniscus being trimmed down and allowing the joint to feel more laxity in it, and i needed to do more physical therapy. After a few months, he suggested getting a second opinion, and now I am looking at a plc reconstruction, and another 6 months off work, which I have been dealing with this since injuring it in January.  So dont be afraid to get a second opinion, and stay on top of things. Hope you recovery goes well.

A second opinion is definitely the way to go.  You do not want to play around with your meniscus, especially if there is still pain.  You could risk tearing it completely if you don't know what is going on exactly.  Once it is torn completely, then you're looking at more major surgery possibly to replace your meniscus. 

@cardiogirl i live in the US too. i found this site even though im not in the uk i can get help and answers so thats why i joined. I believe too that we know what's going on more than the doctors. B4 my repair i was told it was a small tear and mcl sprain and it was nothing to worry about and was sent pt but 3 months along my os was changing facilities and a new hospital so i followed him to the new place and had surgery within his first week there. He came out apologizing to my mom that he was wrong it was a huge tear. So about 6months later or in May i was discharged from PT and was set to do whatever. So i did and now i cant do anything like i normally would. Im in a lifeagaurding class so not being active isnt an option. i feel like i know its the meniscus again because i have problems swimming sometimes because of pain but i have to continue to pass the class and get certified. Im making an appointment with a new guy for 3 weeks from now(i can only go on mondays). But what my problem is, my old OS said that qfter surgery nothing will show up normal or the same on mri's or xray's. yet the same guy said everything looks perfect. On a scale from 1 to 10 my pains at a 9 when i get it. Its off and on but i get it alott. Thinking i just might need to have scare tissue scraped out, since supposedly thats what causing the catching. Or need a scope again to see whats going on, like you said. the problem is finding someone willing to do it. thanks for the advice.