If it has 2 reset buttons it's a Suburban Brand WH (no resets on Atwood)
The resets are for the ECO (high temp t-stats should they Open)
Left one is for the electric element
Right one is for the propane
Whether using electric or propane their 'normal' t-stats are pre-set to Open at 130*F (The ECOs are pre-set to Open at 180*F should normal fail to open)
When the normal t-stats Open the water in tank has to cool to roughly 100*F for the -t-stats to Close again.
Try the propane when water has cooled......open hot side faucet and use the hot water.