Progress Bars inconsistent display with different values

I am using progress bars in my app and I thought they were working fine until on of my values dropped below 70%.

This pic represents 6 progress bars dropped from installed to the canvas. NO changes except for the values I hard coded 42,52,62,69,70,72.

Here is how they display

image

So anyone know how to make them all look like the 70 and 72 version?