I have the discard edits on but make it a point to save prior to moving on. Have also checked that per snapshot setting is on. Still, lot of times its like Stadium will not retain the settings. As an example, set up a test preset. One volume at the beginning of the chain and one at the end. Snapshot 1 has the first one on and second off. Snapshot 2 vice versa. Every time I go to Snapshot 2, the volume at the beginning is on even though I have saved it to off.