I had faced the same issue in the past and after doing lot of research on it I found solution on your issue.
So if you try to remove your shared folder with the use of below command
net use * /del
I can surely say that on your server side you can still find a connection up there.
So to fix your problem you must map your drive in such a specific way to make windows think that it is the other share on different server. To achieve this the easiest way is to use the DNS aliases or the ip addresses. If it is your first mapping and if using the ip address for example
\\IP\Share and it is with your current credential then in that case the solution is easy you must use like
\\ServerName\Share password /user:Domain\Username it will create the new share with a new credentials.