If you need additional help or have more questions or details to share, please join the site so you can reply in this thread. See this link for instructions on how to join Android Central.
Usually, the first number is the one that's dialed if you don't specify one. Write all the numbers for that contact down, delete them all, add 2 and see which one is at the top. Enter them so that the number you want dialed is the one that gets dialed.