When I finish adding a group of family names I always go to a search by that LNAB to make sure I haven't missed a duplicate. (The drop down list on profile entry can be all to easy to miss especially on common names) I sort by first name and then by birth date and visa versa (This tends to find a lot of other duplicates besides the one I am checking). There is no sort by death date search available. This is often the most difficult to verify and I have found numerous examples of the same burial records being used to kill of a number of different but same named people. Perhaps another search if available that may reveal even more duplicates.