I don't know where I got this note, but it illustrates why I stay confused about remotes:
DVDs have a title or top menu, which will take the user to the menu specified for title remote. Timelines have a menu property, which takes you to the menu specified for the timeline (menu remote). The two should not be confused.
Go to the Flowchart and select the Disc icon. Then look at the Properties panel. Set the title remote as you wish - where will the user go when they push the top menu button.
So, logically, I suspect that you do not have the "title remote" set correctly.
But it may also turn out that the buttons are not doing what the Adobe help file says. (I suspect that is where I got the above verbiage. But I can't find it now.) And I have not gotten around to testing this. It is one of those things that can only be tested using real remotes and not computer player.
Maybe the numbers B2 (for the first one) and B1 (for the second one) are related to the problem.
The B1 and B2 show the default button for the menu.