Brush Opacity & Flow hotkeys keep switching
Photoshop CS5
For whatever reason the hotkeys for controling brush opacity and flow switch randomly, and its a bit frustrtating in my work flow.
For the hotkey for Opacity will atlernate between 0-9 and shift + 0-9
The hokey for Flow will alternate between 0-9 and shift + 0-9 as well
One project I will be used to useing shift + 0-9 to adjust the flow, but in the next document it will alter opacity instead.
Anyone know what may be causing this?

