@mg2017 I posted on your thread in #C29HQS63G, but I'll post here for any others following along
Using the "Overwrite Sublists" option, you need to have both addresses on one line (see screenshot)
Otherwise your 1st csv line will overwrite all three addresses, leaving you with only one address. Your 2nd csv line is doing the same thing (overwriting your 1st csv line, leaving you with only one address)