Copia uses different algorithms to automatically detect and interpret changes to code. Copia only has the before and after, and no access to each step as it was performed. As a result, the method (added, removed, etc.) displayed to indicate the change may be different than the actual steps that were performed. For example, renaming contact A to B may be interpreted as deleting contact A and adding contact B. In the end, you will know that a change has occurred, in that location, and will have the accurate before and after. The method is a "best guess" given the information provided.