MYOB AO Tax - Company TR motor vehicle expenses

Hello,

There is a glitch we cannot seem to find the reason why happening.

While preparing company tax returns we use Preparation -> schedule -> Motor Vehicle Expenses to write down the related expenses. We select the related MV enter expenses, choose log book method, fill in log book dates and percentage. When we go back to main tax return Income tab, Motor Vehicle Expenses cell, sometimes the amount from schedule is transferred but most of the time it is not transferred and we have to enter the total expense amount manually. What is the logic behind it? What triggers the amount to be transferred?

Any help is appreciated.

Thanks in advance.