Okay, I think if you look at the Select Sunday's anthem actions, you'll find that they have a due date before their start dates. If there is a start date, that's what OmniFocus will show at the bottom right of the action, otherwise it will show a due date (if there is one). In this case, I'm going to channel
Karnak the Magnificent and divine that the due date on those two actions is...January 27, 2011 :-)
I asked about the syncing because an easy way to get a duplicate with a repeating action is to mark the same action complete on two different devices. The sync code isn't clever enough yet to only keep one of the newly created actions when the two (or more) devices are synced together, and doing so could be a bit complicated in the general case, because you might have gone and edited the newly created actions.