Getting an echo from drums

[RealtorRob]

Hello,
When I'm recording drums using my keyboard, I hit the snare and then another snare hit comes in right afterwards, like an echo or like a delay. I checked all my settings and there is no delay or effects on the track, I've never had this problem before. The only way to get it to stop is if I record the drums in stereo. It's not just the snare either, anything I record using the keyboard comes in with a delay/echo. Any ideas?
Thanks.