Well another shoot about TOC issues.
Can somebody test this file? If should have 3 TOC entries: A,B,C
https://mega.co.nz/#!Aw0zwRZT!tgXegX...BocM-ug8x1ep4U
TOC in Kobo for PC still don't work correctly but it work on Kobo for Android.
Kobo breaking the rules declared in its own documentation...