'But we sang that last week!' Do you know who chooses your church's hymns? Is more than one person involved? Prayerfully? Is it you? Are they chosen on the spot, or the day, week, or month before?
Most musicians, especially the non-expert, appreciate the early choosers. The church where the hymns were announced 12 months ahead, is an extreme case! However you answer my questions, the selectors affect us all.
Six reasons
So it may help to list the six reasons for choosing the same hymn three times in the same month.