To have Infobox tabbers work you’ll need to convert the Infoboxes to portable. I can look at doing that for you sometime during the weekend (it is late Friday night for me now), & if I can’t spare the time I will ask Vanguard to help you.
Chibi Vampire is done, doing Natsume next. Also, it may take a few minutes for the aesthetics of the Chibi Vampire Infoboxes to fix itself, just letting you know. Once you use more than one image in an Infobox <tabber> you will see it in the tabbed way you wanted.