where did it drop
pretty sure depending on the iLVL OF SOME ITEMS it wont have a max of 6. max could be 4 or 5. but some items keep their iLVL no matter where they're dropped..like uhh... they cant drop anywhere before where the iLVL is already high enough (if that makes sense)
maybe look into that
for example: i had 5 flails in my stash. days/week(s) go by im like let me socket these with cube recipe. i socket all of them and not one was above 2 sockets. i think "wtf?" then i remember i picked them all up in normal cows/baal runs or whatever. and im pretty sure thats why they were NEVER gonna roll higher than their ilvl. now if those flails drop in nightmare/hell+ (or whatever the level requirement would have to be) then i could get 4-5
PB cannot drop where ilvl is lower than what is needed for max sockets