Unable to match transactions to invoices

Hi,

I have some unallocated bank transactions but when I try to match them to invoices it won't work.

When I go to the bank transactions the unallocated payments are showing but when I choose to match transaction the list of invoices brings up all invoices (including closed invoices), and the 'Balance Owing' field is blank, even when the invoice hasn't been paid.

Also there's no invoice numbers showing like there usually is.

Here's a screenshot.  There's 3 invoices for this customer. 

The $990 has been paid and is closed.

The $2490 has had $1190 paid and has $1300 owing, which is what this payment needs to be matched to.

The $2350 is open and has no payments.

This was working fine the other day so I'm assuming MYOB have changed something?

Any ideas on how to fix this?

Thanks!