I use this exact mic as well.I use this type of microphone, front and center behind the chin bar with just a foam sock over the entire thing. LoL!
Oh, such irony!
Yeah, I know I can do it in Audacity, but that is just extra work, i rather just have audio on both channels right off the bat. You are probably right about just having a straight mono signal all the way, but the problem I ran into is the adapter that converts the 2.5mm to 3.5mm is a stereo adapter. The local store didn't have a mono adapter, the extension cable is also stereo. I guess most people buy stereo adapters, so they don't carry any mono stuff. I guess I can order something on the internet, but I'm just going to cut off the plug and hard wire it and be done with it. It shouldn't be this complicated in this day and age. Shoei makes great helmets, Sena makes great communication gear, Gopro and Sony make great cameras, but you try to mix them all together to make a motovlogging setup, and it becomes a nightmare. It shouldn't be this complicated is all I'm saying.Personally I don't think it's that hard. A program like audacity will allow you to do it easily enough.
What I like about adobe's software suite is I can open a file from premiere directly in audition, edit it and save it and it will just replace the file in premiere. Relink the audio video and boom you're done.
If you are mixing a stereo cable with a mono mic it will likely place the track on one side. Make sure your hardware chain is all mono from mic to camera and you should get proper mono