A/D IO pins changing function while running?

[Art]

So which is it?

ADCON1 = %00000000 'Set PORTA analog inputs
          ^
          |
          set 8 bit ADC


DEFINE ADC_BITS 10 ' Set number of bits in result

Not sure it is your problem if you've done all your testing with an 8bit range,
but doesn't look good to tell PBP you're doing something you're not.