RADAR CTLR HAD ONE ACFT AT WRONG ALT FOR DIRECTION OF FLT AND LATER HAD LTSS WITH XING TFC.

Narrative

TFC WAS FAIRLY HVY IN THE SECTOR. ON THE W SIDE OF THE SECTOR ARRS FROM THE SW WERE BEING RERTED TO THE NW FIX DUE TO TSTMS. WBOUND DEPS WERE RESTR BY AREA SUPVR TO 20 MI IN TRAIL FROM MSP DEP. THE DEP TFC BEGAN TO DEVIATE FARTHER N THAN ANTICIPATED AND ONE OF THE DEPS TURNED DUE N TO AVOID THE WX. WHEN HE DID HE WAS HEAD ON WITH THE ARR TFC DSNDING INTO MSP. TFC ON THE LAST SIDE OF THE SECTOR WAS ROUTINE. ALL CONCENTRATION WAS DIRECTED AT W SIDE OF SECTOR. MOST OF THE TFC AND ALL OF THE DEVIATING WAS ON THE W SIDE. ON THE E SIDE THERE WAS AN ACFT PROCEEDING FROM EAU TO RZN NON RADAR. AN ACFT WAS APPREQ AT 6000; BUT BECAUSE OF THE NON RADAR TFC WAS APPROVED AT 5000 WRONG ALT FOR DIRECTION. THE APPREQ OCCURRED APPROX 28 MINS BEFORE THE INCIDENT OCCURRED. AS THE RADAR CTLR I WAS NOT CONCENTRATING ON THE STRIPS IN THE SECTOR BECAUSE I WAS TOO BUSY WATCHING THE TFC IN THE SECTOR DEVIATING AND THERE WAS A MANUAL CTLR AND A HDOF CTLR ASSISTING AT THE SECTOR. AFTER LISTENING TO THE TAPE I HEARD THE SWBOUND 5000 TFC MAKE AN INITIAL CALL. I DID NOT HEAR THE CALL SIGN AND ASKED THE ACFT TO SAY AGAIN. THERE WAS NO RESPONSE FROM THAT ACFT. DUE TO THE ACTIVITY GOING ON IN THE SECTOR; I DID NOT ASK A SECOND TIME. ACFT #2 CALLED AND CHKED IN AT 5000 AND I ACKNOWLEDGED THE CALL. A FEW MOMENTS LATER I OBSERVED A LIMITED DATA BLOCK 6 OR 7 MI NE OF ACFT #2. THE HDOF CTLR ADVISED ME THAT IT WAS THE NON RADAR TFC AT 5000. I IMMEDIATELY DSNDED ACFT #1; CLBED ACFT #2 AND THEN TURNED ACFT #2. IN ADDITION TO THE ABOVE ACTIVITY; THE OVERLYING HIGH ALT SECTOR WOULD NOT ACCEPT ANY DEP TFC BECAUSE THEY WERE SATURATED. THAT CAUSED A TREMENDOUS INCREASE IN WORKLOAD BECAUSE WE THEN PUT INTERIM ALTS IN THE COMPUTER SO THERE WEREN'T SO MANY CONFLICT ALERTS. THEN THE ACFT WERE REACHING THE POINT THAT THEY WERE SOON TO BE LEAVING THE LATERAL LIMITS OF OUR AIRSPACE SO IT WAS NECESSARY TO REASSIGN THE ALTS SO THE ADJACENT LOW ALT SECTOR WOULD GET STRIPS.