I discovered that swapping characters restores removed logistics requests. The amount of a request can be changed, the item requested in that slot can be changed, but the request cannot be removed reliably. By changing the item type and amount and repeatedly trying to remove it, some requests can be removed. However, whatever is the last request cannot be removed at all, by any means.

Thanks for the report! I could reproduce that. The problem is that on swapping characters, I restore the slots from the dummy, but the only time the dummy's slots are updated is when characters are exchanged. I think I should also update the dummy's slots in response to defines.events.on_entity_logistic_slot_changed. Once I'm back at my real computer, I'll play around with that.

This should be fixed in version 1.1.30.