As I read through this thread, I think I may be seeing a scenario that I have encountered a couple of times in my own tree. (If I'm missing the boat here, just say so!) Many generations ago a person or family immigrated to the new world and decided to "Americanize" the spelling of their surname. Then, as several more generations of descendants came along, and separated geographically, different branches of the family adopted several different spellings of the Americanized version. (Or some may have reverted back to the original surname.) All the spellings in use eventually became legal names and appear on official records.
If that is the case, then it's really not correct to say that one particular spelling is right and another is wrong. It's quite possible that a Snyder may be descended from a Snider. When a profile is created in WikiTree, the spelling of the surname should be the spelling that the person being profiled used during his or her lifetime, and the spelling that appears in official records. If the person changed the favored spelling during his lifetime, the LNAB and Current Last Name may be spelled differently, or the Other Last Names field can be used to indicate that. But he/she should not be shown with an unused spelling just to enforce consistency. If multiple descendants are now engaged in genealogy and creating profiles, then you need to reach agreement on how/when/where to use each of the spellings that are in current use.