moroso overflow tank squirting

I have tried 2 caps... both with pressure release levers. 14 and 16 lb. my issue is i am using the moroso pictured overflow....the engine runs @170-185 all the time... when i park and open the hood the little pin hole weep hole on top of the moroso unit has sprayed a bit of coolant onto the pass fender.... if i open the petcock.... nothing is in the overflow..... what gives.... would putting too much coolant in the radiator cause this? both caps are brand new..... should the hole be sealed up? when i park the top hose is not hard and the lower has the spring in it and isnt collapsed... this is a decent built 400 engine... this is annoying the crap out of me.... ANY advice i would appreciate.... the radiator is a large 26 4 row old style in very good shape...with cap off the radiator is flowing very well... it couldnt be because of the upper hose being too high could it?