That last help topic provides some possible insight :-o. You'll probably need to click to biggify and this is just a screen shot (a picture of what I'm seeing on my screen), so none of the links work...from this picture...but if you ever, ever need to click that last one, do it!!!
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I am still working on website issues, but not being a "tech" person...I'm probably not getting very far. In fact, I can't even figure out how to google "Can I hire someone to look at my blog and figure out what my problem(s) are?" correctly.
One thing I've done is change the number of posts you can see on each screen. I hate having to click to new pages to read back a few days, but I saw that mentioned as a possible cause of slow loading. Maybe this will help? Let me know!