I have heard back from Neo Smart Blinds. They acknowledge the limitations in the scheduling aspect of the App that are affecting me, and tell me that they are on their todo list.
I received my hub and set it up last night. It was pretty straight forward.
I noted the last update was June 2019. Not sure if you've updated the app but I still can't see a function to able/disable the schedules. The only way to do it still seems to be as per your wife's suggestion or delete them and add them and add them again. (Your wife's suggestion is the better of the two obviously.)
I'll try to email them and make the suggestion too.