As I run a sub & non-sub league for Scotland Club, I tend to bookmark at lot of games.
Unfortunately, when you remove the watch it does not remove the bookmark.
On the bookmark page you have a delete link, but it has to be done seperately for each game. For some reason this can take up to 15 seconds each time you click.
My suggestion is that you have a tick box rather than the links, then you perform multiple adjustments to your selected bookmarked games.