When I deselect <Include Inactive> the Product List doesn't show some products that are actually active - the only way to see them is to <Include Inactive>

SOLVED

I have set the flag on some of my products as inactive.

When I deselect the <Include Inactive> button (hoping to only see the active products), the Product List doesn't include some products - even though they don't have the inactive flag selected on the product record.

Not only that, but Sorting the Product List by Product Code makes some of the missing items appear correctly if I sort top to bottom and others if I sort bottom to top.

Anyone else experienced this?