Seeing some behavior that's a low-level irritation, and hopefully there's a setting to stop it.
There are many times that I set visually identical items with different characteristics in a specific order in my hotbar - such as analyzed seeds for replanting. As I am going through and planting them, I will sometimes hear a 'pop' and one of the items moves to another slot. It's similar to the 'auto-refill' that I thought was part of NEI, but it doesn't always move into the active slot, and sometimes briefly moves out of the active slot. To make matters more frustrating, I can't find the setting in NEI that would enable/disable auto-refill, so I can't even check to see if that's what it is.
Any ideas?