Currently the initiative list is not self updating when one character (or enemy or monster or whatsoever) is removed, and has to be manually removed again. Missing that, it might proof difficult and annoying, especially with large number of same type of enemies - i.e. from goblin 01 to goblin 25…
I believe that that is a bug. Please use the in game bug report tool to report the issue.
I just wanted to say ok thanks but at least 20 words are apparently required.
… so, thanks
// Closing as Bug Report, not Feature Request