Your question is not so clear, but I am assuming that you made a single event with two pages?
If this is the case, then it will, by default, show the second page because RMXP essentially reads from right to left. It will always run the pages that are higher numbered if it's conditions are met. In other words, if you have 5 pages, where 1, 3, 4 have their conditions met, it will run 4. The way to avoid this is to place a condition on the second page that is NOT met when you first activate the event.