BAS online figures are not matched with MYOB manual

I am using MYOB Account Right Plus.

The information pre-filled on my BAS return when I am lodging online is different from the information pre-filled on my BAS return if I were to lodge manually. It is only the GST on sales and on purchases  that differs.  I have checked and both reports are using the accrual system.  I check all BAS manual set up but could not find any problem. 

Is there any chance solution? 

Thank you

CK