AN MD88 CREW; DSNDING INTO ATL; OVERSHOT THEIR ASSIGNED ALT; MISSING A XING RESTR.

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WE WERE FLYING AN MD88 FROM GSO TO ATL AND THE AUTOTHROTTLES WERE INOP. THIS WAS AN MEL ITEM WHICH MEANS THE VNAV FUNCTION OF THE FMS WILL NOT WORK. THE CAPT WAS FLYING THE ACFT WITH THE AUTOPLT WHEN ZTL CLRED US TO CROSS WOMAC INTXN AT 13000 FT AND MAINTAIN A SPD OF 320 KTS OR GREATER UNTIL ADVISED. THE CAPT INITIATED A DSCNT IN INDICATED AIRSPD MODE (SPD ON PITCH). THE RANGE ON ALT ARC (GREEN ARC) ON THE MAP DISPLAY INDICATED WE WOULD INDEED CROSS WOMAC AT 13000 FT AS CLRED. SUBSEQUENTLY; WE BRIEFED THE APCH AND BEGAN THE APCH CHKLIST AROUND THE SAME TIME WE CHKED IN WITH ATL APCH. ATL APCH CLRED US TO CROSS WOMAC AT 13000 FT AND LOGEN AT 10000 FT. THE ALT SELECT WINDOW ON THE FGC PANEL WAS SET TO 10000 FT AND VERIFIED BY BOTH OF US. WE CONTINUED TO COMPLETE THE CHKLIST WHEN APCH CALLED TO SAY OUR POS WAS APPROX 2 MI N OF WOMAC INTXN. I LOOKED AT THE ALTIMETER WHICH INDICATED 12500 FT AND TOLD THE CAPT HE WANTED US TO CROSS WOMAC AT 13000 FT. THE CAPT HAD A LOOK OF SURPRISE AS THE CTLR SAID JUST CROSS LOGEN AT 10000 FT. I THINK THE CAPT WAS PREOCCUPIED WITH FLYING THE ACFT AND RUNNING THE CHKLIST AND MISTOOK THE 10000 FT XING RESTR AT LOGEN TO HAVE CANCELED THE PREVIOUS AT WOMAC. THE CTLR INDICATED WHEN HE HANDED US OFF THAT THEY HAD NO ISSUE WITH MISSING THE WOMAN RESTR. I BELIEVE THE CAUSE FOR MISSING THE RESTR MAY BE DUE TO SEVERAL FACTORS: 1) THE CAPT DID NOT HEAR THE ENTIRE CLRNC AND BY VERIFYING THE NEW ALT I THOUGHT HE HAD. 2) THE CAPT HAD SEVERAL YRS IN THE R SEAT OF THE MD88 BUT HAD ABOUT 80 HRS IN THE L SEAT AT THE TIME; AND FLIES THE ACFT 3 DAYS A MONTH BECAUSE HE IS ALSO A FULL TIME SIMULATOR INSTRUCTOR. 3) THE VNAV FUNCTION WAS NOT OPERATIVE AND ALTHOUGH IT IS NOT NECESSARY TO FLY THE ACFT; SOME PEOPLE REGULARLY RELY ON IT AND FORM THEIR HABIT PATTERNS WITH VNAV IN MIND. 4) MY EXECUTION OF THE CHKLIST WHILE DSNDING FOR 2 XING RESTRS COULD HAVE BEEN BETTER MANAGED. BY THAT I COULD HAVE PAUSED OR HELD A FEW ITEMS MAKING SURE THE CAPT HAD NO QUESTION ABOUT OUR NEED TO LEVEL AT 13000 FT.