append to media, terminate job if no appendable media is available

i have sep 12. version 14 rev 1798.  I have been told that there is a bug in the above option and that the previous option listed(append to media, overwrite if no appenable media)should be chosen.  Has this been resolved yet.  I don't like the idea of having the whole tape overwritten if there is an issue with a late order job in the list of jobs.  Was this really considered a bug?