Power wonders max and min power

Having power strength problems no burning as it should neje 2 20w the issue is pretty much in any given material no power enough specially in cutting mode, i notice every time I change max power power min change as well even if it is grey out, but no evenly, i explain. Max 30 min is 10, then change max to 5 then min to 5, then max 1 min 1, but if I change again max more than 5 example max 50 min still 1, then 100 min still 1 but everything is grey out, so my guess is min power in theory is activated in corner or when is slow down and shouldn’t work in diode laser but do you think is a chance to be the problem here? Thanks