I stopped using meth 7 days ago, so monday-mon, and still tested pos in urine. everything says 6 days max is there a reason for this?

Depends: Good for you for stopping methamphetamine! As far as the drug test goes, every test is different. Most tests show methamphetamines for up to 3 days. There could be other reasons for testing positive such as a medication you might be taking (amphetamine salts or lisdexamfetamine for ADHD?; or even bupropion). Checking with the lab running the test can be helpful in these situations.