How to end a promotion?

I was trying to create a coupon for 10% off all products. All of my products are now showing the regular price grayed out and the 10% less price in red.

How do I change it back?

I have disabled the promotion and the prices do not change back.

Hmm, ok only the home page is showing the price differences. WHen I click on a product or category, the prices are fine. I've tried to clear the cache but that didn't work.

Edited to add: I disabled the two blocks that I had on the the home page and then re-activated them and now the prices are back to where they should be.

Will I have to do that each time I do a promotion?