FLC OF A CORP JET FAILED TO HOLD SHORT AT THE HOLD SHORT RWY LINE RESULTING IN CAUSING ANOTHER ACFT TO BE SENT AROUND BY TWR.

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OUR FLT WAS HOLDING SHORT OF RWY 23L AT HOPKINS INTL. I WAS THE PF DURING THE LEG AND AS I WAS ADJUSTING THE HEIGHT OF MY SEAT FOR DEP THE TWR CALLED US WITH INSTRUCTIONS. I MISSED PART OF THE TWR'S XMISSION; IN FACT; ALL I HAD HEARD WAS '23L' FROM TWR. THE CAPT; WHO WAS HANDLING THE RADIO FOR THE LEG THEN READ BACK 'POS AND HOLD 23L.' I THEN BEGAN A SLOW TAXI TOWARDS RWY 23L. AS I NEARED THE RWY THE TWR RESPONDED WITH 'BEECH JET HOLD POS' WHICH WE IMMEDIATELY DID. A B737 ON ABOUT 3/4 MI FINAL EXECUTED A GAR BECAUSE OF OUR PROX TO THE RWY. WE DID NOT TAXI ONTO THE RWY AT ANY TIME; HOWEVER; WE DID CROSS THE HOLD SHORT LINE FOR RWY 23L. THE CAPT THEN SAID TO TWR 'I READ BACK POS AND HOLD' THE TWR THEN GAVE US TKOF INSTRUCTIONS. THE ENTIRE PROB WAS CAUSED BY MISCOM BTWN MY CAPT AND THE TWR. MY SEAT ADJUSTMENT ALSO CAUSED ME TO MISS THE INITIAL INSTRUCTION FROM TWR. MY ASSUMPTION THAT THE CAPT'S READBACK WAS CORRECT WAS ALSO CONTRIBUTING. THERE WAS ALSO NO CORRECTION FROM TWR FOR THE MISSED READBACK. SUPPLEMENTAL INFO FROM ACN 335683: WHILE AWAITING DEP OF OUR FLT FROM CLEVELAND-HOPKINS ARPT; I HEARD THE TWR CTLR INSTRUCT US TO 'TAXI INTO POS AND HOLD ON RWY 23L.' I READ BACK 'POS AND HOLD ON RWY 23L;' AT WHICH POINT THE FO; WHO WAS FLYING THIS LEG OF THE FLT; BEGAN A SLOW TAXI TOWARD THE RWY. BEFORE THE ACFT REACHED THE RWY; TWR RADIOED 'BEECH JET; HOLD POS. YOU ARE PAST THE HOLD SHORT LINES.' AT THIS POINT; TWR TOLD A B737; WHO WAS ON SHORT FINAL; TO EXECUTE A GAR DUE TO OUR CLOSE PROX TO THE RWY. I BELIEVE THIS INCIDENT OCCURRED DUE TO MISCOM BTWN MYSELF AND TWR CTLR. AT NO TIME DID THE TWR CTLR CORRECT MY READBACK REGARDING 'POS AND HOLD ON RWY 23L.' AT NO TIME DID OUR ACFT ENCROACH THE RWY DURING THE INCIDENT.