Anyone have any ideas where this extra material sheet size might be coming from?

After generating the work order, there's an extra 48x96 sheet size showing up for one of our formula generated materials, when there should only be 49x97 and 61x145.

In the library, for the material itself, there's only 49x97 and 61x145 as sheet sizes listed, so I'm not sure where this other sheet size is coming from. 

This is a formula generated material and I've checked the lookup table and formulas used for these and they should be correct. And even if it was an issue with the table or formulas, there's only two sheet sizes linked to it, so I'm not sure why three get added to the work order. I changed the formula generated material name to make sure there wasn't a different separate material somehow causing this, but all 3 sheet size material names changed when I did that, so that doesn't seem to be it either. 

EDIT:

Found the reason for this. There was another sheet size that was in the M! workbook spreadsheet, which wasn't being shown in the UI. Deleting that out removed the 48x96 sheet in the work order.