If Merge Cells is selected upon setting the app, adjacent cells having the same value will be merged. To edit merged cells, it's necessary to unmerge them first by following the steps shown below. The cells can be merged again after editing.

How to Unmerge

Right-click on krewSheet to display the context menu and select Pause Cell Merge.

How to Remerge

Right-click on krewSheet to display the context menu and select Resume Cell Merge.