Its quite easy to lock the 'Recent Entries' hook to a specific Blog if required, although it seems this feature is not well known about.
Simply view the Blog you wish to use, and get it's ID:
123 is the ID in this case. You need to view the Blog as it will not always match the members ID.
Edit conf_global.php and add the following, the best place is to make it the last line, but obviously before the closing ?> tag
[code]define( 'BLOG_RENTRIES_BLOG_ID', '123' );[/code]
Change the 123 to the correct ID you wish to use and save.