I'm trying to create a list with both main categories and associated sub-categories that can be sorted, occasionally. I've attached a draft example (I hope!). If I sort my table on the basis of the first column as the first level and the second column as the second level, I end up with items in the second column being disassociated with their first column groups.
Is there a way of 'locking' items in the second column to their correct first column groups so that the association is not lost on sorting?
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