Not sure if this is a bug or just a glitch on my browser, but I had phpMyAdmin open on a SiteWorx account and then exited that SiteWorx account and entered a different account.
When clicking the phpMyAdmin link I was taken to the first accounts phpMyAdmin. I then clicked the “exit” link in phpMyAdmin. After doing that when I clicked the phpMyAdmin link in current SiteWorx account it opened correctly.
Not sure if there is a way to automatically close the phpMyAdmin session when logging out of the SiteWorx account.
NOTE: this was going into different SiteWorx accounts via NodeWorx