I have used faction soul battery to lv up my faction weapon. I own a lv6 inferno bow. I was using 2 greater soul batteries and 2 lesser soul batteries to lv up my weapon. Its showed my weapon gains 300 sexp for each lesser soul battery and 1500 sexp for each greater soul battery and I should gain 3600 sexp total. For lv6 inferno bow need 4000 sexp to lv up so I should gain about 1 lv after using soul batteries. But my weapon only gained sexp from about lv6 1x% to lv6 4x%, it is even not enough 1 lv. Is it normal or a bug?