KevinD Right, yeah we did attempt to set the export, but I don't think this was actioned on Giv due to the charge schedule that was set up.
Deselection of negative price slots that meet your criteria may have been reapplied automatically upon Saving, resulting in this behaviour. This is down to our priority of not missing out on any slots that meet your min threshold, regardless of where they are (inside or outside Agile charge window).
Whilst that is OK from an initial population PoV, we probably need to allow you to deselect those (and Save) if you want to plan an export during negative Agile pricing.
We need to look into this in more detail, as the UI allows you to deselect, and auto population for the slots only happens once, shortly after publishing of the Agile rates.
UPDATE: Hmm - cannot reproduce deselecting of slots leading to them get selected again, unless an Agile charge window status was toggled to Active, which causes re-population.