Isn't it odd how whenever I call in an employee on Sunday morning, they suddenly become devout...?

I don't have to use it, I made it very clear to employer I couldn't work on Sundays, period. He accepted that and we're good. If you have a problem with your employees attending Church don't hire a believer, go with those that follow, worship and praise Satan, their available to wreak havoc in your life and your business 24/7.