CC290 bug? And also some letters to make this 15 characters

I was adjusting the settings for a pocket operation and adjusted the stepover value. Any time I open the tool settings subsequently it reverts to the CC calculated value for the stepover. For e.g. I adjust it from .028 to .025 for a 1/16th mill, it saves .025. If I open that edit screen it immediately shows .028 and if I hit okay of course it saves that value.