Spirit BUG with minions necro

Hello ppl ;3
I found a bug or glitch that is giving me more power, i could be quiet for it but i want to share it with ppl cuz i love this game. Soo, when u summon minions u got with actual spirit for (me is 6) and change weapons for worst spirit numer weapon (from 270 to 238), i still keep 6 minions. Instead of having 5 i still do have 6 of them. After relog everything going to normal.