ZC157, responsive classic.

I have been successfully using this plugin for some years.
Now my new 157b site is running commercially.

I installed the Invoice Payment plugin but "invoice" did not show up as a payment method.

I have the invoice customer group set up with id 2 and a 2% discount.
I tried setting the customers_group_pricing=2 in the db as default then the "invoice" did OK show up as a payment method.
The only problem is all payment methods are now giving 2% discounts.

My web site is https://www.simmar.ch, they are changing the servers now so please don't look for a couple of hours

The configuration looks like this
Group Pricing
ID Group Name % Discount
2 Invoice 2.00

Group Discount

This module is installed
true

Sort Order
290

Include Shipping
false

Include Tax
false

Re-calculate Tax
Standard

Tax Class
--none--