Form 231 version 1.5.0 box 7a and 8 doubt

Well i am filing my 6 month return .

Now i am facing a doubt with version 1.5.0 form.

Here this time there are 2 column 7A and box 8.

In 7A once you set the % and type the amount the vat is automatically calculated in following tab.But in 8  one has to type each component.

Now i am not able to differentiate whether i have to repeat data in same column  or whether i have to type only in Box 8.

If i put data only in box 8 than i get a proper detail at bottom of 46000 refund.But if i repeat data in box 7A it shows a wrong data tax due on me.

But at first place how does this both box differs as both appears same to me in details mentioned.