Conclusion: Changing negative feedback to neutral thereby linking both accounts together although they both lose their slot on the previous campaign and will be willing to work with just one in my other campaigns.
Do you mind if I ask why they were kicked out of the campaign in the first place? I am assuming it's because you suspected them of being alts of one individual, but I don't see any restrictions on enrolling multiple accounts in that campaign. Is it the policy of the campaign to not allow alts, but lightlord forgot to mention it? Is this policy yours alone as the manager? Is it mentioned in another post that I failed to find? If such a policy exists I would like to see it listed in the campaign's OP, and if doesn't, well then this whole thread is a huge nothing-burger.
This issue has been covered in a few threads about Campaign Managers recently. At the end of the day it is at the CM's discression who is accepted. Issues such as causing uncertainty can be construed as being cause to be removed.
Disclaimer I am in a SigCamp that CryptopreneurBrainboss is CM of.