There, THAT's what I was looking for. THIS is the point I was trying to make by talking about Ohm's law. I'm not arguing that the total rating of those fuses is 20A in the real world, I conceded that point. As you pointed out, in some cases the rating can actually be less. That's fine, I don't disagree with that.
My point was that paralleling fuses should increase the current rating because that's how current works! That's all. The problem is the way you have been trying to make your point makes it sound like you are directly contradicting Ohm's law, Kirchoff too. If you re-read your arguments from someone else's point of view, I think you'll see what I'm saying.
I found the PDF you linked to. I knew it was what you used because I saw the text you cut and pasted. I read it and found the portion that initfo mentioned that states the rating would be 18A in this case. I'd even typed up a response about it but decided to let it go because I was tired of arguing about this.
I'll be the first to admit I don't know everything. I also admit I learned something here. After all this arguing and typing, the end result is that we actually agree!