A300 LNDG AT MCO EXPRESSED UNCERTAINTY REGARDING APCH CLRNC.

Narrative

DURING THE DSCNT PHASE OF FLT ALL WAS NORMAL. AT APPROX 12000 FT WE CONTACTED MCO APCH. WE WERE INSTRUCTED TO EXPECT AN APCH TO RWY 36L. UPON READING BACK CLRNC INSTRUCTIONS; WE WERE TOLD TO EXPECT RWY 36R INSTEAD. SEVERAL TIMES DURING DSCNT THE APCH CTLR MISTAKENLY ASSIGNED RWY 36L. WE ADVISED ATC AT 20 MI FROM ARPT WE HAD VISUAL CONTACT. A HDG WAS ASSIGNED AND A LOWER ALT GIVEN. NEARING THE FIELD; ATC ASSIGNED US A L DOWNWIND FOR RWY 36R. BOTH CREW MEMBERS THOUGHT WE WERE ISSUED A VISUAL APCH CLRNC TO RWY 36R. A FINAL ALT OF 1600 FT WAS SET IN THE MCP. AT APPROX 2000 FT; ATC ADVISED US TO STOP DSCNT. WE ASKED ABOUT THE VISUAL APCH CLRNC. ATC STATED A VISUAL APCH CLRNC WAS NOT ISSUED. (I SAY SECOND CLRNC BECAUSE I STILL FEEL AN EARLIER CLRNC WAS GIVEN.) SHORTLY AFTER THIS; A SECOND VISUAL APCH CLRNC WAS GIVEN AND ALL ELSE NORMAL. FACTORS TO CONSIDER: 1) POSSIBLE ATC/CREW FATIGUE. 2) MISCOM BTWN CREW AND ATC. 3) NIGHT OPS. RECOMMENDATIONS: WHEN IN DOUBT; ALWAYS DOUBLECHK LAST INSTRUCTIONS.