It sounds like you're holding down the knobs.
It's a quick click and release of the two knobs simultaneously. There are two menus that can be recalled by either clicking or holding the knobs. If you look at the legend on your TWA you will see the menu options for Click and the menu options for Hold. All Combo-Click menus are click and release.
If you are still having problems, please reach out to me via the Chat (when available) or a support ticket and I'll help you out.