BE90 JUMP ACFT AND MD80 HAD LTSS DURING JUMP OPS. CTLR PLT CONFUSION EXISTED AS TO THE CLBING ALT THE JUMP ACFT WAS GOING TO.

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WHILE CLBING OUT OF CEDARTOWN; GA (4A4) IN A KING AIR 65- 90; FLYING SKYDIVERS OVER THE CEDARTOWN ARPT; I CONTACTED ATC AND RPTED MY POS AND THAT I WAS A JUMP PLANE IN THE CLB. THEY GAVE ME A SQUAWK (ZTL) AND ASKED WHAT ALT I WAS CLBING TO. I TOLD THEM A BLOCK FROM 13500-14000 FT MSL. THE CTLR ACKNOWLEDGED THE BLOCK ALT. THIS WAS MY THIRD JUMP RUN OF THE DAY. AS I PASSED THROUGH 13000 FT; THE CTLR CALLED TFC PASSING TO THE NE. I CALLED THAT I HAD THE TFC AND THAT I WOULD MAINTAIN A VISUAL ON THE MD80. I TURNED FROM THE SW TO BEGIN MY FINAL JUMP RUN AND CALLED THE CTLR WITH 1 MIN PRIOR TO JUMPERS. I HAD THE TFC IN SIGHT AND THOUGHT THAT I WOULD SLOW THE DSCNT TO 13500 FT BECAUSE THE JET WAS ONCOMING AND WAS CLOSING RAPIDLY. I STOPPED THE DSCNT ON MY OWN AND WATCHED THE MD80 JET FLY OVER TO THE SW AS I CALLED ATC AND CALLED JUMPERS AWAY. I THEN WENT INTO A R TURNING DROP AND WATCHED THE MD80 JET PASS WELL AWAY TO THE NE. ON MY NEXT RUN; I FOUND OUT THAT I HAD TO CALL ATC. I CALLED ATC AND WAS INFORMED ABOUT THE CTLR'S INQUIRY INTO WHAT HAD HAPPENED. I TALKED TO THE CTLRS AND TOLD THEM EXACTLY WHAT WAS SAID ON THIS NASA FORM. I WAS INFORMED BY THE SUPVR THAT THE CTLR 'ASSUMED;' USING HIS WORDS; THAT I WOULD STOP AT 13500 FT. I TOLD THE CTLR THAT I HAD REQUESTED A BLOCK ALT AND WAS ACKNOWLEDGED WITH THE BLOCK. THE SUPVR TOLD ME THAT 'OH; HE MUST HAVE NOT BEEN PAYING ATTN.' I TALKED FOR A WHILE LONGER AND THEN SAID GOODBYE. THIS COULD HAVE ALL BEEN AVOIDED IN A VARIETY OF WAYS. 1) THE CTLR COULD HAVE PAID ATTN TO MY CALL. JUST BECAUSE I GO UP AND DOWN 18 TIMES A DAY DOESN'T MEAN THEY SHOULD FORGET. I DO THEM A SVC BY ANNOUNCING MY INTENTIONS. 2) THE PLANE DID NOT HAVE TO BE PUT ON TOP OF MY REQUESTED BLOCK RIGHT OVER THE 1 MI RADIUS JUMP ZONE! IT IS A BIG SKY; IT'S NOT EVEN AN ARR RTE. I BELIEVE THAT THE CTLR ASSUMED TOO MUCH BY THINKING I WOULD STOP AT 13500 FT. I WOULD HAVE BEEN MORE THAN WILLING TO HELP THE CTLRS OUT IF THEY HAD REQUESTED IT. I THINK THAT MORE COM BTWN THE JUMP PLTS AND ATC COULD GREATLY REDUCE BOTH SIDE'S WORKLOADS AND OCCURRENCES WHICH IS BEST FOR BOTH SIDES.