Amount fields in saved searches

Does anybody else have a devil of a time finding the right "amount" fields to use in saved searches?

For example... I was trying to create a saved search that includes the amount paid on the invoice.  I selected "Amount Paid", but this comes up with the total of the invoice, instead of the amount after payment terms are deducted (ie, the actual amount they paid).  Looks like a bug to me.

That's not the only Amount field that drives me nuts, though. As noted elsewhere (somewhere) in the UG, the "Amount(Gross)" and "Amount(Net)" always seem to show the same amount -- or at least, I've never seen them differ. Then there's Amount (Credit), Amount (Debit), Amount (Transaction Total), Applied To Link Amount, Applying Link Amount..and just "Amount". Alas, no Amount(Discount), though.