FA20 DEP FROM ONT IS CONFUSED WITH ATC ALT CLRNC.

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ON JUN/WED/03; WE DEPARTED ONT AT APPROX XA05PM WITH THE FOLLOWING CLRNC: 'CLRED TO VCB VIA POMONA 6 DEP; SHAFTER TRANSITION; AS FILED; MAINTAIN 5000 FT; EXPECT FL350 IN 10 MI SQUAWK CODE XXXX.' UPON REACHING ABOUT 4000 FT WE WERE CLRED TO 14000 FT SO WE CONTINUED THE CLB. AT APPROX 9000 FT; THE CTLR CAME BACK ON AND SAID MAINTAIN 8000 FT YOU ARE SUPPOSED TO CROSS POM (POMONA VOR) AT 8000 FT OR BELOW. SO WE WENT BACK DOWN TO 8000 FT TO CROSS THE VOR AT 8000 FT. THE CTLR THEN SAID COMPLY WITH THE POMONA 6 DEP; CLB AND MAINTAIN 14000 FT. THEN TOLD US ONCE AGAIN TO CLB TO AND MAINTAIN 14000 FT; LIKE HE OR SHE WAS TRYING TO CONFUSE US. HE OR SHE DID! BY NOW; WE ARE NOT KNOWING EXACTLY WHAT HE OR SHE WANTS. I HAVE BEEN FLYING FOR 18 YRS AND HAVE OVER 8000 HRS AND HAVE NEVER HEARD SUCH A CONFUSING CLRNC. WHEN GIVEN A CLB TO AND MAINTAIN CLRNC (TO 14000 FT) THIS SUPERCEDES THE WRITTEN SID AS FAR AS I KNOW. THAT IS HOW I HAVE BEEN DOING IT FOR 18 YRS. THIS CTLR SHOULD KNOW BETTER THAN TO ISSUE A CLRNC CONTRARY TO PUBLISHED SID IF HE/SHE DOESN'T WANT THE ACFT TO FOLLOW IT. THE CLRNC SHOULD HAVE BEEN; CLB AND MAINTAIN 14000 FT CROSS THE POMONA VOR AT OR BELOW 8000 FT. WE KNOW THE SID SAYS TO CROSS THE POM VOR AT OR BELOW 8000 FT BUT WE WERE CLRED HIGHER; PRIOR TO REACHING POM.