Something would have to be wrong with the copper level for you to continue to see spots after 10 days even. Any after that means they had been reinfected during the copper levels at the said .5 level which wouldn't be possible.
I would get an independent test if you can. Have you compared to the .5 sample that comes with the testkit?
not even close to the reference. wth?? no I don't know how I should does my tank?? HELP?