The site seemed to fix itself.

Seems some kids are using the reviews as a chat platform and the "Was this helpful to you?" feature as a sort of upvote system. Clever and funny xD
The "glitches" they're talking about are probably just using html for fancy styling ("Can any please teach me glowing text?") or maybe even display images ("Picture Glitch") if the site/app isn't escaping user input properly. Makes me a little worried about the security of the website tho... I wouldn't put my personal details into there.
But really, there are way worse things kids could be doing on the internet than exploiting a bookstore website/app to chat with friends. Some might find an interesting book every once in a while or maybe even get interested in how to make actual websites with their "glitches"
