Your thesis chair keeps asking for revisions you don't understand. Create a change matrix listing original text, comments, and your responses. Talk directly with your committee about what they actually want instead of guessing. A third party can help translate vague feedback into concrete steps.
Chapters
Oh, they just sent it back again. What's going on? There's a couple of explanations for this. One, sometimes when you're reading a document, you don't really see what someone's trying to say until there's been a revision or 2 made, and then you can say, oh, well, if it's going this way, then this revision has to be made. Sometimes people haven't fully read a document, so they send it back asking for revisions. What you want to do is, first of all, send back a change matrix. Meaning, here's what was there, here's what you said, here's how I addressed it. A separate document that'll help them review your document faster. But second, engage in conversation, communication with your chair, with your committee, to find out exactly what they're looking for instead of just blindly doing things. And have someone help you translate what they're asking you, because many times students just don't understand what's being asked, so they try something. And then submit it, and it comes back. Be as methodical and prepared as possible.