appeal at home plate - runner missed touching the plate

[splitveer]

Recently at the ASA Class B state tournament we had this situation. Runner on Second base touches third and goes home on a single to left field.

Coach notices that the umpire did not make a call on the runner. Before the ball goes dead coach has the pitcher throw the ball to the catcher and then touch home plate...still no call....so, the catcher runs toward the dugout where the catcher and runner do the two step before the runner is tagged out.

Here are my questions.

1. I thought to appeal all you had to do was touch the missed base OR touch the runner that missed the base???? Why wasn't the runner called out when we touched the base.

2. When the catcher went to tag the runner by the dugout, where is the baseline considered. Can the runner run anywhere to avoid the catcher?

3. The coach said he would have never noticed if the umpire would not have just starred at the home plate. I saw this in the WCWS and there was a big discussion on whether or not this was correct mechanics by the umpire. What are your thoughts.

Thanks!