Voucher issue

[mildsevenipoiss]

Hi, everyone!

 

I would like to use voucher coupons in my store but I have a some problem. My presta version is 1.5.4.1

I attached some pictures. 

Firsty I have question about this order confirmation page. You can see my voucher description shows twice. Its okey or not, I dont know. 

Secoundly, 

Voucher field is little bit strange. And at the moment I dont know how I can figure out in that issue. Its a invoice.tpl file problem or order confirmation has a little bit buggy.  My invoice should be looke lik this: 

And I noticed today my store shows wrong VAT amount.   Summa KM-ta must be 133,17 and Käibemaks 20% must be 23.97. KM means VAT. In my country we have 20%. Where I can change this calculation formula, what file?

 

 

Sorry my bad english, but I hope everyone understand and if you dont please ask.

[mildsevenipoiss]

And maybe someone knows better Invoice template or Voucher module than default.