v6 and trunk - account_voucher - purchase voucher - incorrect logic

[Vadim - Enapps LTD]

When you try to create a new purchase voucher with multiple lines on, it will not group the tax lines as with the invoice object. Shouldnt this be kept consistent to follow the same logic as the invoice?

Example:

purchase invoice with 2 invoice lines - exp 1 ($50) and exp 2 ($30). both use tax code n - 20%
Account_move_line entries will be:
dr exp 1 $50
dr exp 2 $30
dr purchase tax $16 (10+6)
cr creditors $96

purchase voucher with 2 invoice lines - exp 1 ($50) and exp 2 ($30). both use tax code n - 20%
Account_move_line entries will be:
dr exp 1 $50
dr purchase tax $10
cr creditors $60
dr exp 2 $30
dr purchase tax $6
cr creditors $36

Thanks,

Vadim