@exaltedwombat - the screenshot in first post, presumably from Word, is riddled with anomalies - I've marked those I can see at a glance with my eyeballs, afaik conversion by almost any means will faithfully convert them to epub :
Given you have the document in Word, it should only take a short while to fix most of the anomalies with simple Word macros and Tox's ePub Tools.
I hazard it's a scanned PDF. As has so often been said - getting a perfect conversion of a scanned PDF is tedious. Hitch has explained how they do it in her business on numerous occasions - she probably has it tucked away in her paste buffer
BR