I have seen 'link credits' when there are no visible links on the page. I have seen linked images and no mention on the credit page. I have changed the credits by refreshing the page, and I've added linked items that were already there; the program allowing me to go through the process without stopping me with the 'these items are already linked' message. I'm no techie. If no one else is mentioning it maybe it's only on my end for some reason. If the bosses see nothing wrong then I guess it's just a 'thing' that happens.