When applying postage to an order in Click & Drop. The options are not treating the new 3 Euro duty fee the same.

You are presented with three options when applying postage.
Option 1 - I will pay any taxes, duties & fees with Click & Drop. (PDDP).
Option 2 - Taxes have been prepaid via IOSS. I will pay any duties & fees with Click & Drop. (IOSS PDDP).
Option 3 - The recipient will pay any taxes, duties & fees. DDU.

Option 1 and 3 and working perfectly. Option 2 is not and it needs fixing as a matter of emergency.

Option 1 adds the duty fee based on how many different HS Codes are in the order, regardless of how many items are in the order. 5 items with matching HS Codes will result in 1 duty fee being added. This is correct.

Option 2 adds the duty fee based on how many items are in the order regardless of them having the same HS Codes. 5 items with matching HS Codes will result in 5 duty fees being added. This is NOT correct.

Here is my example order and what happens when trying to pay.

Item 1 = £13.00
Item 2 = £14.00

Items Subtotal: £27.00
Shipping: £15.50
Finland VAT (25.5%): £10.84
Order Total: £53.34

Option 1 - I will pay any taxes, duties & fees with Click & Drop. (PDDP).

International Tracked
£9.80
£0.00
£9.80

Customs Duty Fee
£14.49 (This amount is correct. It is the order tax and one duty fee.)
£0.00
£14.49

Customs Handling Fee
£1.00
£0.00
£1.00

Total postage cost
£25.29
£0.00
£25.29

Option 2 - Taxes have been prepaid via IOSS. I will pay any duties & fees with Click & Drop. (IOSS PDDP).

International Tracked
£9.80
£0.00
£9.80

Customs Duty Fee
£5.11 (This amount is wrong. It has created two duty fees instead of one.)
£0.00
£5.11

Customs Handling Fee
£1.00
£0.00
£1.00

Total postage cost
£15.91
£0.00
£15.91

As you can see, the Customs Duty Fee of Option 2 is incorrect. It has added two duty fees instead of one. They should both only add 1 duty fee, with the only difference in Option 1 also adding Finland VAT (25.5%): £10.84.

I am signed up to an IOSS service. I prepay the EU tax, but this is making the whole system unworkable now. You are essentially stealing by incorrectly adding 3 Euro to every single line. Even though I have signed up to an IOSS service, I have to use Option 3 (DDU) now until you fix this issue.

Please fix this as a matter of emergency. It is an emergency. It is people's livelihoods you are breaking.