Measure the resistance of some DC Motors
It may be 65-ish ohms per motor.  It also may not be.  The 10-11 v output was likely measured on a multimeter.  The fluctuations may mean the output is bouncing around.  The average voltage over some time scale reported by the dc multimeter may not be a good description of the output.  Likewise for the current.  The real output may be swinging from high to low in cycles.  In which case the linear division of dc voltage by dc current may give a somewhat wrong result.  This would not be a concern with a known good stable supply operated within specs.  If you have access to an oscilloscope you can tell pretty quickly.

To get a dc resistance measurement you may need to disconnect the motors and measure their resistance.  

Also, are you sure it's the supply that's broken and not the load?