Partial payments for one and the same item by the payment predictor?

When we create a deposit with two lines, where both lines have the same customer and the same item as reference information and only the two amounts are different, then the payment predictor matches the first line with the item, but places the second line on account at the customer.

Both payment lines are partial payments and we expect the second line also to be matched with the original item instead of placing it as an on account item.

We use the DTL_TLR algorithm group for the handling of our payments.

Does anybody know why the second payment deposit line doesn't match like the first line and what we can do to let the payment predictor match both payment deposit llines with the item?