Unobtainable statistic's max with armor and artifacts.

In game we have 40 total artifacts with 3 different qualities (120 in all), but in statistic menu we can see 42 total artifacts with 3 different qualities (126 in total). Same happened with total 19 common/rare/special armor sets but in game we have 20 sets in statistic (80 for commom, rare and special). That mean we have 304 armor pieces not 316 like in game.