In a previous company we were supposed to always switch back to the onsite VHF after using SEL mode on RMP 2 to set VHF 1. That did indeed create more confusion than not. Now i work in a company where the SOP is to have both RMPs on VHF 1 at all times and it is far less confusion. One just has to remember to switch back immediately after using VHF 2 or 3.