I truly apologize if any of these questions (there's a main one, then one other that is less important) are absolute idiot questions, but I must admit they have me stumped, so I do appreciate any help that I can get.
First off, here's my site: "Narnia Greenville".
The question is this: The timeline (named thermometer.png) is off center, although I have followed all the options from here: "http://css-tricks.com/snippets/css/absolute-center-vertical-horizontal-an-image/", as well as from several other sites. Plus, if you re-size your window, it appears to jump from the right to the left at a certain point for no apparent reason. I can't figure it out, and the last time I attempted a site like this (I failed miserably) I encountered this same type of problem. I'm sure the issue should be staring me in the face (and probably laughing at me), but I can't see it for the life of me. The goal is to get "thermometer.png" centered both horizontally and vertically on the page, and on top of all the other images.
Next: The images are HUGE! And take FOREVER to load, so if you're on a limited internet connection, I suggest moving on to someone else's question. I'm working on that. As I'm sure you can tell, I'm new to most of this. (I've been "rebuilding" wordpress themes for most of my limited web-design experience, and none of it includes this kind of thing. It just works... LoL.) So anyways, although not a specific question, if you feel like documenting how you cut down on image loading time, please feel free to.
Many thanks to anyone who is willing to help me. And again, I apologize if either of these is stupid question. LoL.