There, their, they're

What is wrong with Blogger? In my "Frog race" post I have corrected the grammar several times. However, my post continues to use the wrong "there or their." Does anyone else have this problem? I edit the post and 5 minutes later the misused word is back. Maybe I have some type of Blogger virus on my computer. Nonetheless it is very irritating and embarrassing. I've had other posts as well that refuse to except any changes to misspelled words. Perhaps the problem is only on my side and no one else sees it. Let's hope that's true.