Why can’t I amend some listings?

If a listing has active bids then you cannot make changes as this involves revising an item and ebay's rules state that you cannot revise a listing with active bids.

You are also unable to apply a template theme to an item that has less than 12 hours remaining.

For more information on eBay's listing revision policies see:http://pages.ebay.com/help/sell/questions/revise-item.html#auction_style