I've been having this issue with my drum grid when trying to humanize my drums. I've seen videos on youtube where guys will use varyvel and quantize to quickly humanize their drums, but when I follow this same process, my drum grid gets flooded with random extra notes all over the place. Certain notes disappear as well. Even when I try to do this a measure at a time, or even one piece of the drum kit a measure at a time, this happens. Can anyone explain why this happens and what can be done about it? I haven't been able to find an answer to this anywhere else.