Hi!
Thank you for that video! I can see at least one thing: The Cello Player 5 is missing a "P". I is saying Dimension Player 5 Solo Orchestra. But should be saying Dimension Player P5 Solo Orchestra.
For the Violins, the role id looks indetical, but I suspect that maybe there is a wrong space character somewhere.
Please try to re-assign that role (you can do the same for the cello), by dragging the role from the left to this specific instrument in the list on the right.
An easier way to assign roles inside a venue preset to your instruments would be to click on the arrow down symbol next to the grey role. There you can also select (and especially search) the role you want to assign.
P.S.:
I also spotted the mistake for the Violins. Somehow the role you want to assign to is not called "11 Dimension Violin P8 solo Orchestra I" but "11 Dimension Violin P8 solo Orchestra I".
Note the additional space between Orchestra and the I.