The very first time you bookmark a webpage in the browser the tv asks if you want to also add your favourite bookmarks to your tv home screen. It states that a maximum of 5 bookmarks can be added to your homescreen.
I clicked "no" so havent used the funcionality myself but one would assume that if you click "yes" when first prompted, then each bookmark you save in the browser will be added to your home screen automatically until you have reached the maximum of 5.
A quick look through both the browser and tv settings suggests there is no way to manually enable/disable this option after the initial prompt other tha n resetting the tv to initial settings. There doesnt seem to be any options when selecting a bookmark either so i would assume the homescreen only displays the first 5 bookmarks in your browser list. Can you rearrange your bookmarks within the broswer? That should change the 5 listed in your homescreen. Other than that you may have to delete bookmarks in order to rearrange your list.