B767 CAPT CLBED IN RESPONSE TO TCASII RA FROM A PARACHUTE JUMP ACFT RPTED BY APCH CTL TO BE BELOW HIS ALT. HOWEVER; TCASII INDICATED THAT HE WAS ABOVE THEIR ALT AND DSNDING. THE RPTR BELIEVED THAT HIS ACFT SHOULD HAVE BEEN VECTORED AWAY FROM THE JUMP ACFT TO ELIMINATE ANY CONFLICTION.

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AFTER PASSING TOMSN INTXN ON THE TOMSN 3 ARR INTO DEN; APCH CTL ADVISED US TO DSND TO FL180 AND THAT WE HAD TFC AT OUR 12 O'CLOCK POS APPROX 10 MI AHEAD; A PARACHUTE JUMP AIRPLANE AT 17500 FT MSL. THEY ADVISED THAT WE WOULD HAVE A LOWER ALT ONCE CLR OF TFC. THE LCL ALTIMETER WAS APPROX 29.67 INCHES. I WAS THE PNF AND WAS UNABLE TO ACQUIRE THE TFC VISUALLY BUT I DID NOTICE A TCASII RETURN IN THE SAME VICINITY AT FL186 DSNDING. THE TFC WAS CALLED OUT TO US AGAIN BY ATC AT THE SAME POS APPROX 5 MI AHEAD AT 17500 FT. AGAIN I OBSERVED A TARGET ON TCASII IN THE SAME POS AT FL181 AT WHICH TIME WE RECEIVED A TCASII TA. I ADVISED ATC THAT THE TFC WAS INDICATING FL180 ON TCASII. WE THEN RECEIVED A TCASII RA CLB COMMAND WHICH WAS COMPLIED WITH WHILE ADVISING ATC OF THE SAME WHICH WAS ACKNOWLEDGED. AT FL185; I ACQUIRED THE TFC VISUALLY AND WE RECEIVED A CLR OF CONFLICT MESSAGE FROM TCASII. THE TFC APPEARED TO BE AT MY 1 O'CLOCK POS APPROX 1000 FT BELOW OUR ACFT AND THE TCASII ALT ON THE TFC INDICATED 17400 FT. WE THEN ADVISED ATC THAT WE WERE RETURNING TO OUR ASSIGNED ALT. I BELIEVE THAT WE SHOULD HAVE BEEN DIRECTED AWAY FROM THIS TFC BY ATC. CONTINUOUS MODERATE TURB WITH VERY STRONG WINDS AND AN UNUSUALLY LOW ALTIMETER SETTING COMPLICATED THE SIT.