Click on the manga you want to remove. Use the delete link to permanently remove it from your lists or if you're moving it to your Already Read list make sure the receive updates/notification button isn't checked, so you'll no longer receive updates for that title.
Sorry I didnt explain well:
I used my delete link and it was still there (without tags or rating but still there).
Since it was still there, I would click the link to the manga and it showed me the buttons to add the manga for my list.
So I thought it would erase later and it was just a lag, but when I would go back after a few days (to the page it was in on my Read List), the manga was still there (without tags or rating). Since I still saw it there, I would click delete again with the link and it still wouldn't work. So I thought it was just one manga and left it...but I noticed that it would do it with a lot of mangas and that the number of tags (Yaoi) would increase but instead of decrease (or at least keep a steady number since I kept adding and erasing).
I want to erase mangas from my Read list, but they are still there, without the rating or tags visible, but they still appear there. I tried moving them to the "Want to Read" and erase them there, but it still appeared when I select the tag they where under. Does this happen to someone else? How did you deal with this?