Probably so. The problem with measuring the degree bend in your knee is that it is very sensitive to whether you pedal heel up, heel down, or heel parallel. I would estimate that in my "normal" pedaling style my knee is about 10-15 degrees off 180.

In general, if you are changing your seat height (or any other adjustment) it's best to do so slowly/incrementally, say by 5mm at a time anyway, to give your body time to adjust. If you make a big adjustment, even if it is "correct," it may feel "wrong."