cavcol1, looking at those 2 citations, you have, IMHO, a significantly more fundamental problem....and one that is sometimes quite difficult for those new to genealogy and citation-building to get their arms around. You need to rethink the concept of just what element comprises a source "title" and how that must be differentiated from a "citation" of that same "source".
When your FTM initially created your source "title", it probably looked like attachment 1 (I used FTM 2012). Do NOT edit that "title" to reflect additional, more specific information. If you continue to do so, your source "list" referencing that same "1880 United States Federal Census" will quickly grow to an unmanageable level if it hasn't done so already (Edit > Manage Sources).
There is only one reason that I can think of which would justify the creation of multiple, same-source "titles"...and that would occur if and when you manually cite the same source (eg. "1880 United States Federal Census" [which is ACOM's title preference]) but from a different repository (eg. FamilySearch.org or InternetArchive). In those instances where you must manually construct a citation, first create a new source "title", but this time with the repository name appended (eg. "1880 United States Federal Census [Internet Archive]").
That will successfully differentiate (attachment 2) ACOM-generated citations (either from AMT or FTM) in your "manage sources" list from those that you manually create citing the same "source" but from a different source repository.
Hope that helps.