removed secondary email still being considered as connected to account

Hello, I am in the process of trying to fully migrate to Firefox from previously using both Firefox and Chrome. I wished to remove the secondary email on my primary Firefox account so that I could create a new, separate account to use with a second Firefox installation, because I would prefer to keep all profiles separate as well as sync them across different devices. After removing the secondary email from my account however, I am unable to use it to create a new account. I keep getting the message that I simply need to "log in", and when I try the reset password option it tells me I must use my primary email to reset my account, indicating that my emails are still linked in the system in spite of my supposed deletion of one. I would sincerely appreciate if anyone could help me with this issue. Thank you very much for your help, and for your continued fight for privacy online.