Thanks for explaining the comma rule, delongbi! I would have never noticed any of those mistakes if you hadn't pointed them out. And wow, there's a lot of them! I understood your explanation just fine, so don't worry. Though it looks like I'll be having to go back and edit chapter four, so I better get cracking!
Hopefully there won't be such a long wait for the next chapter. Chapter four is done and should be posted by next Saturday or Sunday, though I can't make any promises.