I don't think I was clear enough on my earlier post - both sets exist and are listed here - the issue is that the checklists, managers, and coaches are identical in each set - only the player cards have different backs. For example, cards 790, 795, 796, 799, & 801 for the Syracuse Chiefs are the same in both sets - included in the team set in 1989 ProCards Minor League Team Sets and issued in packs of the 1989 ProCards Triple-A Baseball. Do these represent a duplication and should they be merged? If so, which set should keep them? Or should they just be left because they were issued with two diffferent sets?