ACR X SAME ALT ASSIGNED HAD LTSS FROM ACR Y. SYS ERROR.

Narrative

AT THE TIME OF THE INCIDENT I HAD A B-767; X; TO EUROPE DEPART RWY 1R AND AN ATR-42 DEPART RWY 1L. I CLBED THE B- 767 TO 10000 FT AND THE ATR-42 TO 9000 FT. THE B-767 WAS IN A CIRCLED 360 DEG HDG AND THE ATR-42 Y WAS ON A CIRCLED 340 DEG HDG. PRIOR TO THESE ACFT; I HAD A C-210 DEPART VFR THAT I DID NOT SPEAK TO FOR 6 MI. HE WAS NE OF THE ARPT AT 1500 FT; TECHNICALLY NOT IN MY AIRSPACE. N ARR HAD AN ACFT AT THE SAME ALT; MERGING; AND WE WERE TRYING TO RESOLVE THAT. I ALSO HAD A BA-31 ABOUT 20 MI NW CLRED TO 11000 FT CLBING OUT OF 4500 FT; WHICH I POINTED OUT TO N ARR AND HE COULD NOT APPROVE; SO I HAD TO VECTOR THAT ACFT FOR THE CLB. I DO NOT KNOW HOW MANY OTHER ACFT WERE ON MY FREQ. I ALSO HAD AN ACFT WITH AN INCORRECT MODE C READOUT. AT THIS POINT THINGS WERE GETTING UNTENABLE. I HAD A 7000 FT OVERFLT COME INTO MY AIRSPACE WITH NO ACCEPTANCE OF A HDOF. I STOPPED THE ATR-42 AND THE B-767 AT 6000 FT. I ALSO; SOMETIME DURING THIS TIME PERIOD; STOPPED THE DEPS TWICE. I AM NOT SURE WHY THIS WAS NOT DONE; BUT ACFT DEPT DEPARTING. WHEN I NOTICED THE 2 6000'S COMING TOGETHER; I TURNED THEM AWAY FROM EACH OTHER. I AM NOT SURE IF I HAD TURNED EITHER ACFT AT ANY TIME PRIOR. BECAUSE OF ARTS TAG OVERLAP (WE DO NOT HAVE LEADER LINE OFF-SET); I DID NOT REALIZE THAT I HAD EXACERBATED THE SIT; AND TURNED THE ACFT EVEN FURTHER INTO EACH OTHER. IMMEDIATELY; I RECTIFIED THAT; BUT LOSS OF SEPARATION HAD ALREADY OCCURRED. NEITHER ACFT MADE ANY CORRECTIVE ACTIONS ALTHOUGH AT LEAST THE B-767 WAS TCASII EQUIPPED. MY NORMAL OP WOULD BE TO USE DIVERGING HDG UNTIL I HAD ALT SEPARATION BUT; BECAUSE OF THE 7000 FT OVERFLT AND THE STOP AT 6000 FT; THIS MAY NOT HAVE HAPPENED. BECAUSE I COULD NOT SEE THE TARGETS OR ARTS TAG (BECAUSE OF NUMEROUS ARTS TAGS).