B737-300 CREW DID NOT FOLLOW PROPER FMC PROGRAMMING PROTOCOL OR COMPANY SOP.

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ALTDEV. WE FLEW FROM ZZZ TO DAL. OPS NORMAL UNTIL STARTING DSCNT. CTR WAS JUST SLIGHTLY LATE BEGINNING OUR DSCNT FOR THE DUMPY 2 ARR TO MEET ORVIL AT 9000 FT. ONCE DSCNT WAS STARTED; CORRECTED TO THE PROPER PROFILE. HE THEN ADVISED ME OF A RWY CHANGE FROM RWY 31 TO RWY 13 AT DAL. WHEN I WENT TO PUT THIS IN THE FMC INSTEAD OF PUSHING DEP/ARR THEN R2; PUSHED LEGS THEN R2. THIS WROTE THE ORVIL RESTR OF 240 DEGS 9000 FT TO THE SCRATCH PAD. THIS CONFUSED ME SLIGHTLY; BUT I ERASED THE PAD AND ENTERED RWY 13 ILS AT DAL. WHEN I RETURNED TO THE DSCNT PAGE; IT SHOWED DSCNT PROFILE. I WENT BACK TO THE LEGS PAGE TO CHK IT. AT THIS POINT I CHANGED THE PAGE FROM ORVIL AT 9000 FT TO DUMPY AT 9000 FT. THIS WAS AN ERROR; BUT I DID NOT CATCH IT. RETURNING TO THE DSCNT PAGE; IT SHOWED US BACK BELOW PROFILE; SO I ASSUMED WE WERE OK. DURING ALL THIS; ATC GAVE US A RPT OF MODERATE TURB FROM FL190 TO FL180. I WAS OCCUPIED WITH THE FASTEN SEATBELT SIGN ALONG WITH SEATING AND THE GETTING THE FLT ATTENDANTS GET BACK UP. (NOTHING MORE THAN LIGHT WAS ENCOUNTERED.) AT ABOUT 15500 FT; ATC ASKED US IF WE WOULD BE 'ANYWHERE CLOSE' TO MAKING ORVIL AT 9000 FT. THE FO SAID WE WOULD TRY. WE WERE ONLY 8-9 MI AWAY; SO I INFORMED ZZZ CTR WE WOULD NEED A VECTOR. WE WERE VECTORED 350 DEG HDG TO JOIN CVE 298 DEG RADIAL AND HANDED OVER TO APCH. WE DSNDED AS QUICKLY AS POSSIBLE TO 9000 FT; BUT WERE INSIDE YEAGER AND ORVIL ON REACHING 9000 FT. I HAD GOTTEN 7 1/2 HRS SLEEP; BUT FELT TIRED. WE HAD A 2 HR GND TIME IN ZZZ1; WHICH DIDN'T HELP. I WAS SURPRISED BY THIS AS I FELT WE WERE DOING FINE; BUT NEITHER THE FO NOR MYSELF CAUGHT THE ERROR. NO TFC CONFLICT OCCURRED. SUPPLEMENTAL INFO FROM ACN 532264: ON-TIME DEP; PREFLT NORMAL. PUT ORVIL AT 9000 FT IN FMC WHEN PROGRAMMING. EXPECTING STANDARD ARR INTO DAL. TAXI; TKOF; DEP NORMAL. AFTER LEVELOFF; CAPT TALKED TO PAX ABOUT A REMINDER OF SEATBELTS. ATC HAD ADVISED US OF MODERATE TURB 17000 FT TO FL190 ON DSCNT. WE WERE CRUISING AT FL350. SHORTLY AFTER HE WENT OFF; WE WERE GIVEN PLT'S DISCRETION TO FL240. WHEN HE CAME BACK UP ON COURSE; I TOLD HIM OF NEW CLRNC PLT'S DISCRETION FL240 AND POINTED TO FMC SHOWING WE WERE APCHING DSCNT POINT. WE WERE CLRED TO CROSS AT ORVIL AT 9000 FT. I DIDN'T MAKE THE CONNECTION ABOUT THE FMC ERROR AT THE TIME. WE HAD PLANNED ON RWY 31L (DISPATCH SHOWED LNDG RWY 3L). WHEN I HEARD THIS; I MADE A COMMENT WHEREUPON HE WENT TO FMC. I WASN'T WATCHING WHAT HE WAS DOING; BUT I FIGURED IT WAS REPROGRAMMING RWY TO RWY 13R. I CAME BACK ON COM. I HAD THE FULL ATIS. HE INFORMED ME THE 9000 FT RESTR HAD BEEN ENTERED WRONG AND THAT THE RESTR WAS AT DUMPY NOT ORVIL. IT DIDN'T REGISTER WITH ME THAT I HAD PROGRAMMED IT CORRECTLY AND THAT THE CAPT WAS WRONG. AFTER CHANGING THE FMC TO REFLECT DUMPY AT 9000 FT; WE WERE IMMEDIATELY LOW ON PROFILE. WE SLOWED THE DSCNT RATE. THE CAPT THEN WENT OFF RADIO TO TELL THE FLT ATTENDANTS TO SIT DOWN; SINCE WE WERE APCHING THE 17000 FT TO FL190 ALT BACK WHERE THE MODERATE TURB. WE PASSED THIS ALT AND I CONTINUED TO MONITOR THIS DSCNT; BUT NEVER RECONFIRMED THE NEW ALT RESTR THE CAPT CHANGED. I REMEMBER THINKING 'HOW COULD I MAKE SUCH A MISTAKE WHEN I FLY THIS RECOVERY SO OFTEN?' I JUST ASSUMED I WAS WRONG AND HE WAS RIGHT. APCHING ORVIL; ATC ASKED US IF WE WERE GOING TO MAKE THE RESTR. THIS WAS MY FIRST CLUE WE WERE NOT FLYING TO THE R ALT. THE CAPT COVERED MY INITIAL CALL BY SAYING WE WEREN'T GOING TO MAKE IT AND WE WERE GIVEN A VECTOR FOR DSCNT AND LEVELING AWAY FROM ORVIL. WE MADE THE DSCNT AND GOT TURNED BACK TO DUMPY. THE REST OF THE APCH AND DSCNT AND LOADING WERE NORMAL.