1) Why does text in top Navigation appears twice?
You need to use an exclude or include function, once u make the pages enter the ID of contact us page in Theme options navigation section. If you are using include function then do not use contact page ID in top menu pages section. If you are using exclude then enter contact page Id in top menu pages section as well enter in the below contact page ID section. For more information on how to do so see koncept theme options in admin area.Please read the documentation carefully provided with the package.