Thanks for your response. I have added the query p=40, but it still has the same problem:
1. On the contact page it displays two markers (http://www.company12.com/new/contact/)
2. On other pages it only displays the large marker
I think an issue might be that both original maps are on page 40. I only do this because I want users that click on the button to go to the contact page.
If there is no direct solution for my problem, an alternative solution might be to disable the link of the marker. Is there any query that allows to disable the popup and / or link when you click the marker?