yil: seems like nxtools was the reason (v. 1.05a) not 100% sure but very possible. I tested nxtools 1.06 and the problem does not appear in the new version so.
What happend was when reseting stats, site resetstats allup / alldn / all dn whatever, it reseted the wrong line inside the userfiles, the admingroup line. Which basiclly gave you gadmin rights of group 0 50 times over
anyways using 1.06 should fix it