System not hitting Variance G/L when Invoice amount > PO value
I have set the tolerance group in the configuration where both lower and upper limit is 5%. My problem is, when the amount I keyed in the invoice is less than the PO value (still in the range of 5%), simulate it, the posting will hit 3 G/L ( vendor, accrual and variance). But if the invoice amount is higher(still in the range of 5%), it will hit only 2 G/L (vendor & accrual) and this will not allowed for FI posting. How can I insert the variance GL and please advice if this is the correct way.