Fuel gushing out when i top off my tank.

[richards72chevy]

With all the other gas cap problems going on i decieded to post my own thread so i dont hijack another one.Fuel will start gushing out from a little line in front of my engine when i top off the tank.Im not going over board when i top off my tank.I stop once that pump stops i dont even try getting to the dollar amount.The problem use to only happen when it was realy cold or hot.In recent years it seemed to happen more.I have had different gas caps and that dosnt seem to help.I do have a charcoal canister in my engine bay.Where do you guys think i should start to fix this problem?