Why is my building displaying a different time than it takes to actually complete?
You can ask your friends and Allies to help finish an upgrade or Research more quickly by posting requests for help on your Facebook Wall and in-game Chat. This feature is already selected by default when you begin a build or upgrade.
You can check if this feature is activated by ensuring that the box which reads "Request Help From Friends" in the construction or Research Modal is checked.
When this box is checked, the Build Time shown will reflect the amount of time it would take to finish the construction or Upgrade with the max amount of help possible.
If you would like to see the actual upgrade/construction time, unclick the "Request Help From Friends" box. This will change the build time shown to reflect the amount of time it would take to complete the build or Research with no help from your friends.