CPR X HAD LTSS FROM ACR Y. MERGED TARGETS. SYS ERROR.

Narrative

CPR Y DEPARTED ILG. I WAS ISSUED DIRECT ENO. MADE A POINTOUT AND CLBED TO 80. ZDC CALLED AND ASKED MY TRAINEE TO PUT CPR Y ON A 160 DEG. THE TURN WAS ISSUED AND CPR Y WAS INSTRUCTED TO CONTACT ZDC. A COUPLE OF MINS LATER THE CTLR ASKED WHAT ACR Y WAS DOING. I OBSERVED CPR X AND ACR Y MERGE AT 100 ABOUT 15 S OF DQO. ZDC HAS CTL FOR CLB PER LOA AND APPARENTLY ASSUMED ACR Y WOULD CONTINUE N INSTEAD OF TURNING TOWARD ARPT ACCORDING TO THE STAR. SUPPLEMENTAL INFO FROM ACN 197358: ACR Y; A PHL ARR; WAS ISSUED A HDG OF 060 DEGS AT 10000. CPR X WAS PREVIOUSLY COORDINATED FOR A CLB TO 8000 PLUS HDOF TO ZDC. ZDC SUBSEQUENTLY CALLED THE DQO SECTOR BACK AND ASKED FOR 160 DEG HDG FOR CLB AND IT WAS APPROVED. THE ZDC CTLR APPARENTLY BELIEVED THAT ACR Y WAS GOING TO CONTINUE NBOUND INSTEAD OF TURNING TOWARD PHL AND CLBED CPR X THROUGH ACR Y ALT. MERGING TARGET PROCS WERE APPLIED AS I BELIEVED ZDC WAS ONLY CLBING TO 90. WHEN I OBSERVED THE CPR X THROUGH 9300 FT I ISSUED A TA; A TURN AND TFC AT WHICH TIME ACR Y RPTED THE TFC IN SIGHT.