SMA EXECUTES UNAUTHORIZED TOUCH-AND-GO AT MBS WHEN CLRED ONLY TO LAND.

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OPERATING FROM AN UNCTLED FIELD; I LIKE TO KEEP FRESH ON PROC IN CTL AREAS BY PERFORMING TOUCH-AND-GOES IN THE LCL TRSA AT MBS AIRFIELD. DURING MY INITIAL CALL-UP TO APCH CTL; I INFORMED THEM OF MY INTENTIONS TO PERFORM TWO TOUCH-AND-GOES. I RECEIVED MY TRANSPONDER CODE AND EVERYTHING CONTINUED AS USUAL. I WAS TURNED OVER TO TWR AND THEN RECEIVED A CLRNC TO LAND. NOW; WHEN A PLT HAS PRACTICED SOMETHING AND EXPECTS TO HEAR THE CORRECT RESPONSES; HE USUALLY ENDS UP HEARING WHAT HE WANTS TO HEAR. I INTERPRETED THE CLRNC TO LAND AS CLRNC TO PROCEED WITH MY TOUCH-AND-GO. AFTER I HAD LIFTED OFF AND WAS APCHING 200 AGL; THE TWR INFORMED ME THAT I HAD NOT RECEIVED CLRNC. FOR A TOUCH-AND-GO BUT ONLY CLRNC FOR A FULL STOP LNDG. EXPECTING CLRNC FOR THE TOUCH-AND-GO; THAT IS EXACTLY HOW I INTERPRETED THE CTLR GIVING ME CLRNC TO LAND. I FEEL THAT THE CTLR; KNOWING I WAS EXPECTING TO DO A TOUCH-AND-GO BUT YET NOT GIVING ME CLRNC TO DO SO; SHOULD HAVE TOLD ME PLAINLY THAT I WOULD NOT BE ABLE TO CARRY OUT MY INTENTIONS.