@Hogshunters, do you mean you want to add the Essex Mega TBs to your Watchlist?

If you go onto the trackable page, see 'Trackable Options' (on the top right). Below 'Found it? Log it!' there is an option to add a TB to your watchlist.

This is the same watchlist as your cache watchlist, except once you are watching trackables it divides it into caches you are watching and trackables you are watching.

Hope this helps?