Item No. with two different rates

Hello,

I started a new role recently and was tasked with untangling a pricing issue.

The item I am trying to update is 8 - it is showing two different rates for different products. Both are outdated and need to be adjusted.

When I go to to the Items list, it shows a rate of .154;

There are two different product associated with this line item... any ideas on where I would go to update? As shown on the first image, the invoice shows the two different rates but this Item screen is the only place I can find where this can be adjusted.

I have spent so many hours looking around... any help would be so greatly appreciated!

Thank you.