Seven more meet records were broken yesterday in the sixth annual Maryland Long Course Swimming Championships in Rockville, and the Rockville Montgomery Swim Club won the championship by a margin of 1,514 1/2 points.

In the junior competition, Julie Kole, Marci Iddinas and Bruce Simms picked up where they left off Saturday, winning all the events they entered. Kole, an unattached swimmer who was high point scorer in the girls 10-and-under class, setting two records Saturday, broke the 100-meter butterfly mark by 3 1/2 seconds, finishing in 1:17.20.

Iddinas swam the 11-12 100 butterfly in 1:11.25, with second place Jacque Wisnauskas (1:11.53) also breaking the record. Iddinas was the high point scorer in her class. Simms, of the Columbia Corsairs, broke the boys 11-12 record in the 50 freestyle with a 28.72.

In the senior session, Beth Spector of RMSC set a 200 breaststroke mark and Alissa Hess of the Allentown Road Aquatics Club a 100 backstroke mark. RMSC's Dan Veitch set a record in the 100 backstroke (1:01.60) and tied David Everhart for second in the point standings behind teammate David Stekert. Andy Martin gave RMSC a record of 2:17.34 in the 200 butterfly.

Jude DeSando of RMSC was high points scorer among the senior girls.

RMSC won the team standings with 1,802 points. Columbia Corsairs was second with 287 1/2 points, North Baltimore Aquatics Club third with 268 and the Mariner Swim Club fourth with 223 1/2.