The "Odds and Futures Page Visible Sportsbook" setting in Odds Assist Pro controls what sportsbooks are shown in the Compare Odds and Futures tools.
If you remove a sportsbook from this section in settings, they won't show in these tools, even if they are selected in the on-page filter.
Only remove sportsbooks here that you never want to see in these tools.
Say, for example, you don't like using DraftKings for whatever reason.
In this case, you can unselect DraftKings from this setting and they will never show in the odds and futures tools.