I have not had any problems infact i think it has help the Recieve on both scanner by having them like that. The 3rd antenna is a VHF/UHF ham antenna. that came with my Icom. I don't use it to TX much becuase i don't have my ham Lic yet. I hope i will be able to do so soon tho.
I get wolcott all the time. Sometimes i lock them out cause the go ENC. I hate listening to that!