I wouldn't call it extensively covered. Only one question deals with it.
Why would the subject require more than one question? 
I'm not saying it should have more than one question, just that it isn't extensively covered.
Q: "When traveling in a straight direction, you will always reach the same point on the globe from where you started. How can this happen if the world is flat?"
A: You need to have evidence for this to be true. Also, define "straight." Remember, the northern point on the compass is, under most circumstances (unless near the center or deep in the ice wall), pointing toward the center of the Earth. If you follow your compass due east or due west, ending up at the same point you started from, you've just gone around the world in a circle. Thus, circumnavigation is possible on FE.
Thats all it says.
And this is another ridiculously complicated reason for a simple phenomenon. The obvious answer is that the earth is round. Why doesn't someone just fly off the edge off the earth in a plane? Why hasn't this been done?
And please, DONT mention the damn FAQs again. Do you have some sort of machine that posts a message saying "read the FAQs" whenever someone types a question? Your FAQs aren't particularly comprehensive.