When splitting an Expense, it seems common sense to show the amount remaining after having entered the first item.  Right now, what's shown at the bottom of the itemise section is ... the amount you've just entered.  Why?  I know what I just entered.  I just entered it. 

In fairness, I guess if one enters multiple items, it'd show the sum.  Fine.  I'm sure it'd be more useful though to show the amount remaining (of the full expense).  I have to work it out myself every time.