Give Us The Option
For registered users, it seems it would be a fairly easy programming matter to allow each user to have a set of PLAY OPTIONS that they can change. E.G., "Show duplicates? (Y/N)" and "Eliminate Previous Entry when Duplicated?" and "Don't Show Duplicates" (radio button to select one of the three). Since you've already done the programming to do each method, all you need to do now is to let each user pick which to use. Presto, no more "Which way to go?" dilemmas.
Another option could be "Show On-Screen Timer?" Etc.
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