One interesting aspect of college wrestling is no matter how many points you trail by, you are never out of a match.    The third-ranked UNO wrestling team was reminded of that fact in its North Central Conference dual meet Friday night against a scrappy Minnesota State-Mankato team.    Even though No. 5 Minnesota State was missing four starters, including two ranked wrestlers, the University of Nebraska at Omaha was still pushed in a 22-12 win at Sapp Fieldhouse.    The stunner of the night was top-ranked Roderick Ratcliff's loss by pin to Minnesota State backup Dustin Kulseth at 141 pounds.    Ratcliff built a quick 10-2 lead, nearly pinning Kulseth twice. Ratcliff then barreled in on a duck-under takedown attempt late in the first period, but Kulseth countered the move and sent Ratcliff sprawling to his back. Referee Tom Vincentini slapped the mat with just seven seconds left in the period.    "Kulseth is a pinner," MSU Coach Jim Makovsky said. "He has a really unorthodox style. He gets himself in trouble, but he can get himself out of trouble."    Kulseth isn't the only Minnesota State wrestler with an unusual style, UNO Coach Mike Denney said.    "They have a bunch of dangerous wrestlers," he said. "We will have to make some adjustments the next time we wrestle them."    UNO's Cody Ritter, ranked seventh, fought off his back in the first period and recovered to outlast No. 6 Hannon Hisek 11-7 in the night's final bout at 149. Ritter scored the opening takedown, but Hisek countered Ritter's near-fall attempt and scored a reversal while putting Ritter on his back.    Ritter managed to fight back and score a reversal. Ritter then rode Hisek the entire second period, tilting Hisek for a three-point near fall late in the period to take the lead for good.    "This was a real big win for me - I am on my way up the ladder," Ritter said. "My confidence just keeps building."    Seven matches were decided by four points or less. UNO's Bobby Edmonds won the closest bout, breaking free for an escape in double overtime to beat Jake Emerick 2-1 at 174.    Kurt Bohaboj (165) won by major decision for UNO while teammates Dan Hilario (125), Zach Stalder (184), Chad Wallace (197) and Lance Tolstedt (heavyweight) won by decision.    Minnesota State was without No. 4 Lester Berrios at 125 and No. 5 Matt Gadient at 165. Both are out with hamstring injuries.    Nebraska-Omaha beat St. Cloud State 34-3 on Saturday night. UNO is 9-2 overall and 5-1 in the North Central Conference.    In another matchup of top 10 teams, No. 1 Central Oklahoma handed No. 9 Nebraska-Kearney its first loss of the season as the Bronchos won 33-6 at home Friday night.    Central Oklahoma, tuning up for this Friday's meet with Nebraska-Omaha, won 8 of 10 matches. The Bronchos won the featured bout at 149 with No. 4 Michael Barreras edging No. 1 Brandon Pfizenmaier of Kearney 3-2.    In a matchup of the first- and second-place teams from last year's national tournament, No. 2 North Dakota State beat No. 12 South Dakota State 27-13 on Saturday.    In a rematch of the national championship match at heavyweight, defending champion Nick Severson of North Dakota State took South Dakota State's Jon Madsen down five seconds into overtime to win 6-4. Madsen won the national title in 2000.    South Dakota State's Todd Paszek, ranked seventh, beat No. 3 Brian Kraemer 8-0 at 197.    North Dakota State improved to 9-2 overall and 4-0 in the North Central Conference. SDSU is 7-7.