Welcome! This forum has a treasure trove of great info – Scouters helping Scouters! Just a heads up, though - all content, information, and opinions shared on this forum are those of the author, not the BSA.
On scouting.org I have 2 active ID’s. One is from when I was in Scouts as a youth, and it has my kids on it (would like this to be the surviving ID if it matters as it has my Eagle on it): 110212763. The other ID is 14342975 and has my leader application and information on it for Pack 99. Is it possible to merge these? We are all active in Daniel Webster Council, BSA 330 cub scout Pack 99 in Goffstown, NH.
Your leader ID needs to be primary - you can try log into my.scouting.org > Click Manage Member ID > one of the BSA # will be there marked PRIMARY > then add the other MID (BSA #) - you want to make the one that is your unit registration PRIMARY - if the stuff does not match we can help