The following is a response to HouTex who was kind enough to try and help me:
"Good afternoon HouTX,
Thank you for your help! I don’t think this is what’s happening with me. Besides the two sensors that I mentioned, I have another door sensor in the same direction but further away, in a bedroom that is communicating just fine. I also purchased another repeater for a door that leads to my garage in the opposite direction that communicates with the base but in the app. it has a red signal that indicates a weak or poor signal. No matter where I place the repeater these three devices show they are having problems with the signal."
Anyway, the repeaters have been installed for a while now and the problem persists.