May I ask how you are determining her reading level? Sometimes, the tests only determine up to a certain level, so if she hit the celiling, the highest it will report is the level it stopped calculating at.
I would worry about HOW she is reading when she is reading than to what any number would tell you she is at, for the reason mentioned above.
I had a teacher tell me DD's wordcount per minute only to find out that she left out that there weren't any more words on the page left to read, so it wasn't a true picture of her ability.
