Motion Detectors and range extender

I have 2 motion detectors in an outbuilding with a range extender that is within 10ft of each. The range extender is 30 foot from the base. Both sensors read weak signal however the range extender is showing in good connection. Support suggested I addf another range extender. (where would I put it?). My CO and smoke alarm also show a weak signal per Ring support. This capability is not on the app. Any suggestions? I feel I made a big mistake with Ring.