Mysterious Axis problem

I have a chart with a simple sequential number series as the horizontal Axis. The plots are appearing incorrectly against this axis. If it should be at the 2nd position it appears at position 9?

If I reverse the axis the bar correctly appears at position 2, but - I don't want the axis numbers reversed.



^
10 9 8 7 6 5 4 3 2 1
CURRENT


^
1 2 3 4 5 6 7 8 9 10
WITH REVERSED AXIS


^
10 9 8 7 6 5 4 3 2 1
DESIRED OUTCOME?

Can anyone tell me what wrong?

Thanks, Michael