[DNSB]

The characters are rtl but the text should be on the right side of the page as in the Sigil and Thorium images.

Edit: I dug back a couple of years and found a test epub2 file I had created that was in Hebrew. I munged that with the Hebrew and Arabic chapters of my font test file. One thing I noticed was that for epub2, I had specified text-align: right as the default. Sample render from ADE 4.5.11 attached.