Invoice manager + Shipment by rules = big probelm

[marvays]

Hi friends.
I have big big problem!

I am buy, instal and configure Inovice manager from joomlathat.com
I have for shipment plugin from open-tools.net

All wotks so good, but

If I give new order, where shipment using open-tools plugin, in invoice manager i have two rows with TAX. First row = items tax + payment method VAT. Second row = shipment VAT. problem is in plugin, but if i try use standard shipment by weight, i have one VAT from items, shipment and payment.

It is one big problem for me.

I need use open tools but need shipment tarif via MaxLength on items
Name=do 50kg; 50>Weight; 1>MaxLength; Shipping=165.289
Name=nad 50kg; 50<=Weight<250; 1>MaxLength; Shipping=619.834
Name=nad 250kg; 250<=Weight; 1>MaxLength; Shipping=826.446
Name=Paletová přeprava; 50<=Weight<250; 1<=MaxLength; Shipping=619.834
Name=Paletová přeprava; 50>Weight; 1<=MaxLength; Shipping=619.834
Name=Paletová přeprava; 250<=Weight; 1<=MaxLength; Shipping=826.446

Can I do anything?

Virtuemart must have this feature. High time

[marvays]

from support Invoice Manager: "if you set all the items tax to be the same type you can have just 1 line for all tax..."