I am not exactly for sure without knowing the exact timeframe but once a case is opened the buyer actually has up to 4 days to send a payment once you open the case. I am going to assume that you were well within the four day timeframe to close the case or else it would not allow you to do so. So with that being said, if the case was closed then your buyer will not be allowed to make payment, thus seeing "dispute process has blocked buyer from making payment." The case was closed in your favor, they received a unpaid item strike, you get your FVF's back and you can move on. They no longer have the option to pay for the item, nor are you obligated to sell to them.
I am really not sure what advice you are seeking though, since you have already relisted the doll? If the case would still have been open, then no you should not have relisted but since it was closed on your part, you have every right to relist. There is no longer a binding contract between you and your buyer since the case was closed. There is nothing she can do. She is not allowed to leave a negative on a closed non-paying item case. If she does call eBay and they will remove it right away.
I wouldn't worry though, it sounds like your bases are covered.