Ball strikes runner

[Lilblue612]

In a Little League game, played under the official Little League rules, the following play occured with one out and a runner on first base. The batter hits a grounder between the first and second baseman. The first baseman attempts for the ball, but it glances of his glove and strikes the runner moving from first to second base. However, in my opinion the second baseman still had a reasonable chance at making a play at first or second base if the runner did not come in contact with the ball. I therefore called the runner out, and awarded the batter first base. The question is, even if the first baseman makes some contact with the ball, is a runner who then comes in contact with the ball out if another fielder had a reasonable chance at making an out had the runner not struck the ball? After consulting the little league rule book I believe my call may have been correct, but could not make a definitive conclusion. Any advice or criticism would be appreciated.