Main Shops don't have item hovers for various reasons; this is intentional and not a glitch. There is a user suggestion topic that discusses this here, if you'd like to leave your thoughts: Hover blurbs in restocking shops

I am not sure what you mean about the item-destroyer, so I'm afraid you'll have to be more specific. Could you be talking about the Fragmentizer?

No problem!

For the "item destroyer", could you mean the rift or the recycle beast maybe?

Ah okay! So.. I can confirm that this is not a glitch.

However, we welcome feedback and suggestions on ways to improve the website like this, so if you'd like to suggest we add item hovers to that page, I encourage you to do so in the Suggestions forums. For a small suggestion like this, I recommend posting on this topic: The Giant List of Usability and Random Improvement 2.0

Thank you for bringing this up, and I hope this helps :)