That happened for the "Cursed" one, right? This is what I just got when starting as Barbossa:So the only remaining issue I think I had was questbook entries with weird endings (after the text in the relevant questbook file) they are still there.
No weird stuff there that I can see. Have you deleted the "options" file yet? Perhaps that one got corrupted for you.

Depending on the character model you choose, you could start as Midshipman or as Admiral.I guess you can add removing the "congratulations on your promotion" from the text in Robert Fletcher for the Naval skip (since it doesn't suit a midshipman. Perhaps "congratulations on your temporary appointment to command perform well and you will soon earn a full promotion" or some such (I don't know how hard that next promotion is to earn?)
Lieutenant is the most common one as that is the default for all characters that aren't linked to a specific rank.
Perhaps for accuracy a different line can be used when you're a Midshipman.