As well as making cash allocations between transactions, allocations can also be “corrected” (i.e. reversed or un-allocated) via an Allocation Correction. An Allocation Correction will show up with opposite values as compared to the original allocation in the Allocation Value column of the Allocations window.
Check the list of allocations made as listed against the relevant transaction(s) and check to see which were normal “cash allocations” and which are corrections/reversals.
If the original allocation has been “un-allocated” via an allocation correction/reversal, then the invoice total will still be shown as outstanding, even though it looks like there are a list of allocations.
