The effects seem to be randomly turning on. I don't have any of the left or right deck effects mapped to my controller but for some reason they come on once in a while. I had to manually turn them off several times during the night. I haven't really paid much attention to what I was doing during those times but one thing I noticed is that it seems to happen on both decks at the same time (although I use instant doubles a lot), and when it does, it's always the same effect for the whole night. Other nights a different effect might go on and that effect will randomly go on for the night. Don't know if it's a bug, but it happened enough times that I thought I'd report it here. I hadn't really noticed how much it's been happening until I started playing back my recorded sets. I'll see if I can make more observations next time it happens.