[Toxaris]

It is always best to avoid special characters, including spaces, in filenames. If you open up the ePUB in Sigil you can easily rename the filenames of the images. The references to the images are then also changed to reflect the namechange.
There is also a built in validator in Sigil which usually much better understandable errror messages.

If you just open and save the file in Sigil, some of your errors will already be solved.

As a remark to your opening post, you state that 'None of the images are showing where they are supposed to - text flow is incorrect.'
I hope you are aware that ePUB is a reflowable format so it almost impossible to force the location of the images and still fill out the pages.