Under the same transaction category, Refund transactions should offset the original transaction (even if the amounts don't match).

Explanation: A user has a bunch of expenses under a head say "Eating out" which totals to say £100. Now if a friend transfers in his contribution of say £20 for the food, it comes as "Money In" and when the user classifies it as "Eating out" ideally the total of "Eating Out" should reduce by £20. This does not happen in the current version. Pls fix this in a future version. Thanks.