Before I start posting a new chapter, I go through the whole thing and edit dialogue and fix up mistakes and stuff, yeah! I take a week off between each chapter, to allow me to, you know, draw the cover illustration and all. XD But yes, I do nitpick and edit. I rarely redraw anything from scratch, though. I've only done that once, for one panel in chapter 3 - I try not to get stuck reworking old stuff, so I only allow myself to fix up some crooked lines here and there, and edit the dialogue.
There's one panel in chapter 4 that's going to get poked at a bit, maybe adding a detail in the background, but yeah. That's about it.
<3 So happy you like them! They're a bunch of fun to draw! Only two more to go now before I'm done! :3