Can we have some clarity on the permanent deletion? and 500 errors

Permanent deletion was enabled via command line.

I went to delete a post, waited the minute to permanently delete it. Says deleted and doesnt show as hidden anymore. However it shows in the logs>staff actions>show everything>delete post. So the post is not really permanently deleted if there is a log file with all the information. How does this affect privacy or legal orders to delete information if its retained in logs anyway?

I also went to prior (soft deleted) posts. Found them in thread as hidden. Went to permanently delete them and get a 500 server error when attempting to delete the older post so that doesnt work for now.