PRIVATE PLT OF SMA; CONFUSED AS TO WHICH PARALLEL RWY PRECEDING TRAFFIC WAS CLRED; LANDS ON THE SAME RWY WHILE STILL OCCUPIED BY THE ACFT.

Narrative

UPON DOWNWIND (L TFC) I WAS ADVISED TO CONTINUE PATTERN AND FOLLOW TFC. THE TFC WAS ON R BASE FOR RWY 22L. I WAS ON L TFC FOR RWY 22L AS WELL. I THOUGHT THAT THE TFC WAS DOING R TFC FOR RWY 22R. UPON TURNING BASE AND FINAL; THERE WAS MARGINAL SEPARATION BTWN ME AND THE TFC IN THE FRONT. I WAS NOT ADVISED TO GO AROUND ON FINAL. I THOUGHT THAT THE SEPARATION WAS SUFFICIENT AND THAT THE TFC WOULD TKOF BEFORE I CROSSED THE RWY THRESHOLD. I DID NOT GO AROUND OR DEVIATE BECAUSE I WAS NOT ADVISED TO DO SO AND ALSO; I HAD THE IMPRESSION THAT A 'GAR' WOULD BE UNSAFE DUE TO THE TFC IN THE PATTERN ON DOWNWIND OR FLYING OVER TOP OF THE TFC THAT LANDED IN FRONT OF ME; WHOSE INTENTIONS SEEMED UNCLR TO ME. TFC IN THE FRONT HAD CALLED FOR TOUCH AND GOES BUT SEEMED TO HAVE BEEN TRYING TO STOP ON THE RWY PRIOR TO TAKING OFF AGAIN. I STOPPED THE ACFT WITHIN APPROX 300 FT OFF THE ACFT IN THE FRONT. I WAS UNAWARE THAT THE TFC; WHILE WE WERE STILL FLYING; WAS THE TFC I WAS SUPPOSED TO FOLLOW. I WAS ALREADY 45 DEGS FROM THE RWY ON DOWNWIND WHILE THE TFC MADE A R TURN FOR FINAL.