No, after I went to the 3rd vol. of the Haggard omnibus, to its TOC, I tried everything to access it. The #7 key gives the omnibus contents (the 3 volumes) regardless of where the reading page is when the key is pressed. The 9/0 are back/forward, the 8 is increase size of font, 1-6 don't do anything when accessing an epub.
Actually, I perhaps used incorrectly terminology in referring to the volume TOC, but none the less, it must be a formatting issue causing the different behavior of epubs as outlined in my last post.