Dishwasher leaked on floor

I removed the old door gasket and cleaned the channel that the gasket sits in. Then I marked the center of the gasket and matched it with the center of the channel. The door latch did get in the way so I had to have another set of hand to get it started. It pretty much went in by hand just by pushing it. There was extra gasket on either side of the bottom of the door. I trimmed to make it fit perfectly. The first time I used the dishwasher it didn't leak. Unfortunately, the second time I did it leaked again. I am going to run it again tomorrow, but does anyone have an idea why it might still be leaking? Thanks