Homepage not showing latest post

I haven't posted for a couple of weeks, but when I posted last night, the new post didn't show up at the top of my home page. It seems to have the right date, it shows up in the next post link at the bottom of the last post (which shows up at the top of the homepage right now), and it opens fine if you use that link. It just doesn't show up on the home page. The most recent post should be "Historic San German, Puerto Rico" NOT the Washington DC cherries. HELP! Cindy http://explorationvacation.net/