hi, Gita. The 'watch this thread' link seems to have moved to the upper right hand corner of the screen when you're looking at a post in the thread.
When you're looking at the home page, if you scroll way down towards the bottom of the page, on the left you'll see a link that says, 'Customize your home page'. Click on that link.
The page it will take you to looks a little confusing, but all you have to do to move your watched threads up to the top of your home page is to:
(1) scroll down to one of the bottom boxes and look for a little box that says 'watcher notifications'.
(2) Click and drag that little box way up and place it in one of the Row 2 boxes.
If you put it in the left Row 2 box, it will appear on the left top of your page, and if you put it in the right-hand Row 2 box, it will appear on the right top of your page.