A320 FLC LANDS ON THE WRONG RWY AT MCO.

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ATC VECTORED US TO A CLOSE-IN L HAND VISUAL APCH TO RWY 36R. TWR CLRED US TO LAND. UPON TURNING FINAL; WE WERE SLIGHTLY HIGH ON VASI; BUT THE DESCENT APPEARED TO BE CONVERGING TO THE CORRECT GLIDEPATH. CAPT CALLED FOR FLT DIRECTORS OFF AND BRING UP THE 'BIRD' AND TO SET THE INBOUND COURSE. AFTER REVIEWING THE APCH CHART; I LOOKED UP TO NOTICE A LIGHT ACFT DEPARTING OFF THE RWY AND WAS CLR. AS WE PASSED THROUGH APPROX 100 FT AGL; IT OCCURRED TO ME THAT THE RWY WAS FARTHER FROM THE TERMINAL THAN THE 10-9 CHART DEPICTED. AT APPROX 50 FT AGL; I BECAME AWARE THAT WE MAY ACTUALLY BE LNDG ON RWY 36L INSTEAD OF RWY 36R. AS WE BEGAN TO FLARE; I COULDN'T DECIDE WHICH WAS THE SAFER COURSE OF ACTION; TO STARTLE THE CAPT WITH A GAR COMMAND OR ALLOW HIM TO CONTINUE TO LAND ON A RWY WITHOUT CONFLICTING TFC. WE TOUCHED DOWN AND I TOLD THE CAPT WE HAD LANDED ON THE WRONG RWY. TWR CLRED US TO CROSS RWY 36R AND C0NTACT GND. THERE WAS NO MENTION MADE OF THIS BY ANY CTLR AND THE ACFT CONTINUED TO THE GATE WITHOUT FURTHER INCIDENT. SUPPLEMENTAL INFO FROM ACN 571238: WAS BEING VECTORED BY KMCO APCH CTL; FOR AN APCH TO RWY 36R. WHILE ON BASE TO FINAL; WE WERE CLRED FOR A VISUAL APCH. ACFT WAS SLIGHTLY HIGH ON PROFILE; BUT WAS GOING TO BE IN PROPER LNDG CONFIGURATION AT 1000 AGL. I CALLED FOR 'FD'S OFF; BRING UP THE BIRD; SET INBOUND TRACK.' CONTINUED APCH AND MADE A NORMAL LNDG. ON ROLL OUT; TWR CLRED US TO 'CROSS THE RIGHT; CONTACT GND.' WE REALIZED THAT WE HAD LANDED ON THE WRONG RWY (RWY 36L). NO COMMENT WAS MADE FROM ATC. IN TRYING TO ANALYZE WHY THIS HAPPENED; IT OCCURRED TO ME THAT MOST OF THE LANDINGS I DO TO PARALLEL RWYS ARE DONE TO THE OUTSIDE RWY AND SWITCHING OFF THE FD'S FOR A VISUAL APCH ARE TWO THINGS THAT MAY HAVE CONTRIBUTED TO THIS ERROR. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT THE FLT CTL UNIT (FCU) WAS SELECTED TO FLT NAV VECTOR MODE WHEN THE FLT WAS CLRED FOR THE VISUAL APCH AS PER COMPANY POLICY; BUT BOTH HE AND THE CAPT WERE 'HEADS OUT OF COCKPIT' CONCENTRATING ON THE VISUAL APCH SINCE THEY WERE HIGH AND IN CLOSE AND THEY WERE PREOCCUPIED WITH GETTING THE ACFT DOWN. RPTR STATED THAT HE DID NOT THINK THAT THE PARALLEL TXWY TO THE LEFT OF 36L WAS A CONFUSION FACTOR; BUT THE LEFT BASE TO THE RIGHT RWY WAS A FACTOR BECAUSE IT SEEMED MORE NORMAL FOR A LEFT BASE TO BE FOR THE LEFT PARALLEL. RPTR ADVISED THAT HE DID NOT RECALL ANY COCKPIT BRIEFING PARTICULARLY RELATED TO THE LNDG. RPTR STATED THAT THERE WERE NO COMS FROM THE TWR AFTER THEY WERE CLRED TO LAND WHILE ON THE BASE LEG. RPTR STATED THAT HE ACKNOWLEDGED THE CLRNC AND READ BACK; RWY '36R.' RPTR STATED THAT HE HEARD AN ACFT BEING CLRED FOR TKOF ON RWY 36L AND THAT REINFORCED HIS IMPRESSION THAT RWY 36L WAS THE RWY IN USE. RPTR STATED THAT HE AND THE CAPT HAD A GOOD WORKING RELATIONSHIP; THAT CRM WAS GOOD; AND THAT THERE WERE NO SCHEDULE PRESSURE; DUTY TIME; OR FATIGUE FACTORS INVOLVED. RPTR STATED THAT THIS WAS THE FIRST FLT OF THE DAY. RPTR ADVISED THAT THE ARPT TFC WAS VERY LIGHT AT THE TIME OF THE INCIDENT. RPTR STATED THAT HE HAS FLOWN INTO THIS ARPT ON THREE OTHER OCCASIONS; BUT THIS WAS THE FIRST TIME THE APCH WAS FROM THE S; LNDG N. RPTR STATED THAT AFTER HE REALIZED THEY WERE LNDG ON RWY 36L; HE FELT IT WOULD BE SAFER TO LAND THAN GO AROUND FROM THE FLARE. RPTR STATED THE RWY WAS CLEAR AND THAT AFTER ROLLOUT TWR ADVISED THEM TO CROSS RWY 36R AND CONTACT GND. RPTR STATED THAT THERE WAS NO MENTION OF THE INCIDENT BY ANY CTLR. CALLBACK CONVERSATION WITH RPTR ACN 571328 REVEALED THE FOLLOWING INFO: RPTR STATED THE HE HAD THE FCU SET TO FLT PATH VECTOR MODE AS PER COMPANY POLICY ON VISUAL APCHES AND HAD THE FO SET THE INBOUND COURSE WITH A THREE DEG GLIDE SLOPE. RPTR STATED THAT THIS CAUSES THE FLT DIRECTOR BARS TO BE REPLACED BY THE FLT PATH DIRECTOR/FLT PATH VECTOR SYMBOLS. RPTR STATED HE GLANCED AT THE INSTRUMENTS A COUPLE OF TIMES ON THE VISUAL APCH; BUT DID NOT LOOK AT THE LOC RAW DATA. RPTR STATED THAT THE PARALLEL TXWY TO THE LEFT OF RWY 36L MAY HAVE BEEN A SUBCONSCIOUS CONFUSION FACTOR. RPTR ALSO STATED THAT A LEFT BASE TO THE RIGHT PARALLEL WAS CONFUSING. RPTR STATED THAT THE APCH VECTOR LED TO A SLIGHTLY TIGHT APCH TO THE RWY. RPTR STATED THAT HE HEARD THE FO MUMBLING SOMETHING STARTING AT ABOUT 100 FT ABOVE THE RWY.