I'm trying to compare "Last click or direct conversions" (assisted conversions) with transactions (overview) per source/medium. The numbers (except for the sums) differ widely, but in no specific way (I though conversions should be less than transactions since there can only be one per user, but often transactions are greater).
BTW: There are also more source/medium combinations in "assisted conversions" (400) than in the transactions tab (300).
Any idea what the reason is?