Strange Behavior - Clips Self-Editing???

I've noticed several irregularities recently that are really frustrating. I've had several instances in which clips get random fades and slip edits apparently on their own, which is super frustrating and took me a long time to figure out and fix. It has happened twice- on different projects. A track that was perfect all of a sudden started dropping out at different spots and I couldn't figure out why. Then I expanded the lane view and the clip had all these slip edits and fades that I hadn't perform. On one of the instances there were no other take lanes, just the one track. The other time, there was another lane with some clips in it. Has anyone experienced this?
 
I am wondering if the clip got inadvertently linked to another clip I was editing on another track or if it happened randomly, but to be honest I'm not sure. I think it happened on its own. The project was fine and then all of a sudden it sounded odd and the edits were there.