TRACON TRACON INTERFAC COORD. TRACON INTRAFAC COORD. SMA X BEING WORKED BY WRONG SECTOR HAD LTSS FROM SMA Y. SYS ERROR.

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WRIGHT-PATTERSON AFB (FFO) SCHEDULED A FLY-IN FOR GA ACFT. THE AIR FORCE AND DAYTON ATCT ALLOWED WELL OVER 600 ACFT; MOSTLY VFR; TO ARRIVE UNREGULATED. AS A RESULT; THE DAYTON RADAR CTLRS; WHO WERE TO SEQUENCE ALL ACFT TO FFO; WERE OVERWHELMED. THERE WAS MUCH CONFUSION BOTH IN THE FACILITY AND BTWN DAY AND OTHER FACILITIES. CMH APCH RTED ALL FFO ARRS OVER THE SAME FIX REGARDLESS OF RTE OF FLT. AS A RESULT; AUTOMATED HDOFS FLASHED AT THE WRONG SCOPES. SMA X WAS HANDED OFF VIA AUTOMATION TO ANOTHER SECTOR BUT WAS RTED INTO MY AIRSPACE AND WAS NOT SWITCHED TO MY FREQ. DUE TO BEING OVERLOADED WITH ACFT AND FREQ CONGESTION; I DIDN'T HAVE TIME TO FIND OUT WHO WAS TALKING TO SMA X. SMA Y WAS HANDED OFF 5-6 MI IN TRAIL OF SMA X; ALSO AT 4000; AND WAS SWITCHED TO ME. 15 MI IN MY AIRSPACE THE SMA X STARTED A R TURN BACK TO THE E. I INSTRUCTED SMA Y TO TURN L IMMEDIATELY AND DSND TO 3000. SMA X DID A 360 DEG TURN AND PASSED 1 MI FROM SMA Y WHICH WAS DSNDING OUT OF 3700 FT. I CALLED TFC BUT SMA Y DIDN'T SEE HIM. A CONTRIBUTING FACTOR WAS THAT I HAD ALREADY WORKED AN HR OF EXTREMELY HVY TFC. IN THE FUTURE (THIS FLY-IN IS AN ANNUAL EVENT). SOME TYPE OF REG OF FFO ARRS HAS TO TAKE PLACE.