Try troubleshooting the Safari .plist (preferences) on one of the Macs.
Quit Safari then open the Finder. From the Finder menu bar click Go > Go to Folder
Type this exactly as you see it here:
Click Go then move the com.apple.Safari.plist file to the Desktop.
Relaunch Safari to test. If that helped, move the .plist file to the Trash. If not, move it back to the Preferences folder.
Thank you Carolyn for taking the time to reply. I followed your instruction but unfortunately that did not resolve the issue. It appears as soon as I launched Safari it recreated another com.apple.Safari.plist in Finder. I dragged the original back into finder and told it to replace the newer. It is pretty weird that it is on both of my computers making me wonder if it is something with my internet service and Lion and/or Mountain Lion.