Hello,
No it is not possible to have 1 insert list and one dual mode list in the same group of lists. When you switch the pedal from insert mode to dual mode, it will switch the available lists you can use. When you want to use dual mode, you’ll need to switch the pedal into dual mode in the system settings, and you will now have a different selection of user 1-4 lists to choose from. The lists are organized this way so that you don’t mistakenly make incorrect routings in your setup that could cause feedback loops, etc.
There is no “always on” option for presets. You can make your list so that every Program has a slap back delay, but you will need to create each Program individually to do that.
Let me know if you have any other questions.