2 FINAL CTLRS WORKING TFC TO PARALLEL RWYS AT MSP MISCUE ON RESPECTIVE BASE LEGS AND LOSE STANDARD SEPARATION.

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ACFT X ON DOWNWIND VECTOR DSNDING FROM 8000 FT TO 5000 FT AT 210 KTS FOR ILS RWY 30L BEING WORKED BY S APCH CTL. ACFT Y ON BASE LEG LEVEL AT 5000 FT BEING WORKED BY N APCH CTL FOR ILS RWY 30R. THE S APCH CTLR WAS THE 'LOW' SIDE (ACFT AT 3000 FT OR 4000 FT AT LOC INTERCEPT) AND THE N APCH CTLR WAS THE HIGH SIDE (ACFT AT 5000 FT OR ABOVE AT LOC INTERCEPT). ACFT X TURNED TO 040 DEGS (BASE LEG) HEADING AND DSNDED TO 3000 FT. THE INITIAL CLRNC TO 3000 FT WAS PARTIALLY BLOCKED BY ANOTHER ACFT CHKING ON THE FREQ; AND THE CLRNC TO 3000 FT HAD TO BE RESTATED; AND WAS ACKNOWLEDGED BY ACFT X. 6 SECONDS LATER ACFT X WAS TOLD TO EXPEDITE DSCNT TO 3000 FT. 11 SECONDS LATER ACFT X WAS ISSUED HEADING OF R TURN TO 150 DEGS; EXPEDITE DSCNT TO 3000 FT; TFC AT 12 O'CLOCK POS; 5 MI. ACFT Y WAS LEVEL AT 5000 FT BEING VECTORED THROUGH THE RWY 30R LOC FOR SPACING WITH OTHER TFC AHEAD ON THE LOC. 32 SECONDS HAD PASSED SINCE ACFT X WAS INITIALLY ISSUED DSCNT TO 3000 FT. ACFT X WAS STILL AT 5000 FT WHEN EVASIVE ACTION WAS TAKEN; WHEN ACFT X WAS TURNED TO 150 DEGS BY S APCH; ACFT Y WAS TURNED FROM 220 DEGS TO 340 DEGS BY N APCH. BOTH ACFT RPTED TCASII ALERTS WITH ACFT X ADVISED TO CLB AND ACFT Y ADVISED TO DSND. THE TCASII ALERTS WERE OPPOSITE OF WHAT THE CTLRS WERE TRYING TO DO. THE S APCH CTLR WAS DECERTIFIED BECAUSE OF LOSS OF SEPARATION; FAAH 7110.65 PARAGRAPH 5-5-3. THIS OCCURRED AT THE BEGINNING OF AN INBOUND RUSH. THE ILS STAGGER WAS BEING ESTABLISHED WITH 6 ACFT ON THE S APCH FREQ AND 2 ACFT ON THE N APCH FREQ. THE S APCH CTLR WAS TRAINING A LOW TIME DEVELOPMENTAL. THE DISTANCE ACFT Y WAS VECTORED THROUGH THE LOC WAS FURTHER THAN ANTICIPATED BY THE S APCH CTLR; SO A MISJUDGEMENT WAS MADE WHEN ACFT X WAS TURNED TO THE BASE LEG. ACFT X DID NOT DSND AS ANTICIPATED.