I agree. We have the scenario of 'the Christmas party' 5 or so transactions but a single overall event/expense. 

Therefore, without all the messing around/excluding etc, we have to create an expanse for every single transaction/round of drinks. Then to review the overall cost of that event, the individual expenses need to be manually added!? 

It really seems odd that you can create an expense with multiple line items, but the algorithm can only see /match the total of an expense rather than the line item (great if all those line items are in a single transaction, not so if you spend on multiple occasions under the same expense) - that would make this so much simpler (and obvious) which is surely the point of quickbooks?  I have often wondered why this is the case. It would be good to ensure this is included in future development as surely the reduction of overall admin is the aim here?