Hi Larry,
Atwood cook tops are normally pretty dependable. Normally the center burner is the hi-performance with the larger flame. Is the flame larger than normal? are the other burners abnormally larger or is the blue flame gap from burner head roaring or unusually noisey? If so, it could be an LPG regulator at the LP tank is starting to fail. If so, other indications are erratic furnace operation or the refer going to "check" when on LP.
To check the pressure of the LP system, you will need a "Manometer" You should not have more than 11" water column pressure. You may need to call around or take your coach to an RV shop to have this done.
WARNING: this is a "Safety" issue that needs to be addressed quickly. The last thing we want to hear is
"News and Weather at 10:00 about an RV"
Hope this helps. Regards, Fred