Nah, it has nothing to do with a problem, just the way your brain processes visual information. You've probably seen those emails that go around with blocks of text where every word is scrambled up - all but the first and last letters of each word. Most people can read the text regardless since your brain is more concerned with syntax and grammar being correct - each word is identified only by the first and last letters, and the mind does this easily once you realize how the text has been modified.
So similarly spelled words taken out of context, as when glossing over a list of threads, can be interpreted to mean whatever the mind grabs onto. I'm sure you don't sleep at night thinking about Shiva's cat, nor do you contemplate Charles' home state very often. Therefore those topics don't have a good context in your brain, so you make something up - "collage" is exactly one letter away from "college" and Shiva is a proper name, so your mind makes the jump to a more useful and familiar concept. Charles' SF moniker has no good meaning outside the forum, so your brain quickly jumps to a more sensible solution - an orchid genus (this is an orchid forum, no?).
We have to remember that in truth we do this with all data streams coming in through our senses - they are interpreted ruthlessly into bits of meaning and with this we create a world. The reality is that there is no "out there" out there - it is all interpretation, so what you see literally ain't so. With language it is even more confusing.
Well, that's it for now, I've got to go get a drink
