Uh oh, what did the temp spike to? Even a little above 103 for just a shirt time is usually a bad thing, and can kill the developing embryos.
My embryos move around when I candle too, so that's normal, it's kind of like they want to move away from the light, like it ticks them off, lol. Developing at different rates is normal too, but it might be a good idea for you to rotate the eggs around in the incubator every time you turn them, in case your incubator has warm and cool spots (if you haven't been already)... I do that as often as I can in my incubators just to try to let every egg receive more even heating thru the incubation period, and grow more at the same rate.
Sorry to read about your tick bite, I hate those nasty blood sucking disease spreading creatures. I've never had lymes disease, but I hear it's not fun.