As I just tested, a Corporate Spinoff action initiated in one account should have been replicated in other accounts holding that parent security. Wondering why that did not happen for you?!?
Moving on from your situation, in account B I would have entered a Corporate Acquisition also dated 2/1/22 with CEG acquiring your CEG1 security at a 1:1 share ratio. I would have then deleted the now extraneous CEG1 Adds (from the spin-off) and the Remove (from the acquisition).
You should be aware that the current (dating back to late 2021) spin-off action does not apply the RtrnCap distributions correctly to the parent shares for a multi-lot holding. The differences may or may not be significant; I cannot generalize on that aspect. In your case the Cost Basis of each lot of Exelon (all 160+ lots) are incorrect although the total is (or should be) correct. More info on that here:
Perhaps I should have added, your other option was to edit each one of the 80+ Add Shares of CEG1 to change the security name to theCEG version. With a paste action, that is not as daunting as it might seem. I think I would still opt for the 80+ delete actions. And using a Banking Transactions Report therein selecting the transactions to delete, the deletion effort can also be greatly reduced.
To be clear I was suggesting a 1:1 CORPORATE ACQUISITION action, not another spinoff.
