bhm-dl.k-atl-dl.k-clt-dl.b-atl-dl.b-bhm is what I entered (BHM-ATL-CLT on K fare) and CLT-ATL-BHM on B fare as PM.

Here's what I got back

BHM–ATL: 134 miles on DL in K. As a platinum, earned 500 MQM and 1000 redeemable miles.
ATL–CLT: 227 miles on DL in K. As a platinum, earned 500 MQM and 1000 redeemable miles.
CLT–ATL: 227 miles on DL in B. As a platinum, earned 750 MQM and 568 redeemable miles.
ATL–BHM: 134 miles on DL in B. As a platinum, earned 750 MQM and 335 redeemable miles

CLT-ATL and ATL-BHM are minimum 500, and PM bonus is 500. Total redeemable miles should be 4,000 (1,000 per segment).

Otherwise, looks nice.