Figured this out. If you are having issues with editing the check in guide, it is because it is being glitchy. I was able to "reboot" the glitch by going into and starting a "new" check in method. I put in "test" for text where it tells you to post instructions and hit next. It then allowed me to edit my check-in instructions and afterwards, there was a "Edit" button that now appears under the check in method I originally set up. If this does not work for you, I would recommend killing the app and trying, and then deleting and reinstallling the app if killing it does not work. Hope this helps.