Dealer Excise Purchase

Dear Experts,

I searched in Google for the Dealer Excise to take cenvat credit , i found the one link its very useful for this, in this case , i try to create new tax code like BED 0%, Cess 0%, SCess 0% with 5 % VAT. whil i try to assign the value for JMOP (BED) in FV11 with 0% its not taking as 0 value , its automatically taking 5 % , then i save with 5 %, thne i try to change in FV12 also its not changing the values. what is the solution for this to make as ZERO in % ?

then second questions is , i take a sample of BED 12 % Cess 2 % Scess 1% with VAT 5 % tax code like this same process, i changed the ED values in MIGO Level with MRP Indicator in Excise Tab. in MGO and J1IEX its posted correctly in accounting document, but in MIRO i am getting the following Material GL 11205120 as Debit, screen shot attached, why its coming ? kindly check and do the needful ..

SAPFunctional.com - Use of MRP indicator for capturing excise duties from dealer

Thanks & Regards

Ilavarasan TD