I think I can explain...
It's not always easy to tell the difference (for us old gits with bad eyes) but if there is a working link, the text is green , but otherwise, it is black. As I said, it's not always easy to see, so I think that may be your problem. It particularly affects the late 70's onwards.
Now...
You told me about Trevor Geer at Poole in 1977. There is no active file for Poole OR White City in 1977. However, if you search by year (rather than by team), you will find a file for the 1977 complete season results, and that is where I found it.
Again, it is no criticism of Matt, Jim, or anyone else who has worked on the site, but not everything is available in every section. A lot of the time, the info just hasn't made it to the site, but sometimes it is, but just not available on team AND year. That is why I'd like to find time to help; it's not necessarily a case of searching for information, just collating the stuff already there.