Sage
When Art first wrote the plugin for the shuttle he had the centre wheel default to continuous mode.
Users (myself included) asked that it default to incremental, which is how most users would want the centre wheel to be.
As it was you needed to devote a button to switch to incremental and remember to do so every time the software started.
The outer wheel already does continuous why would you want the centre wheel to do so as well?
As to why the MPG screen is stuck on step mode and the step is stuck on 0.001, I have no idea. That is not normal and not how mine works.
You did not by any chance install the software that came with the Shuttle did you? If so uninstall it.
To know what the step increment is, best to place the step DRO on the run screen. Never understood why it should be hidden on a flyout screen. (which I never use

)
Greg