The issues I've had with other sportsbook have been with withdrawals and not being able to cashout big wins. I've also been banned from nitrogensports for multiple accounts when I never had multiple. They seized a lot of my funds as well. The parlay that won with Dallas was successfully cashed out:) just waiting for Denver Broncos. Still haven't sold the parlay get so still accepting offers until gametime.
That is crazy! I have never heard of any kind or restrictions on having numerous accounts on nitrogensports. There are hundreds of users who have mulitple accounts. Infact, when you enter the site you have the option of logging in or creating a quick new account. I would contact them, if that was the reason for ban they should fix this.