Does that epic drop every 12 cons. drops works?

To test it out i filled my inv. almost full and saw that there is only 1 epic helm drop in about 130 items and couple rares (6 i think didnt even pay attention since it was to test epic drops) i think you shouldnt mislead ppl by saying that on loading screen its just bs.
The guaranteed one epic item in twelve only applies to a purchase of 12 items at once for 100 souls in the store. Otherwise, drops are probabilistic, like rolling a 1000 sided die and hoping for a number between one and ten to land.