It may be the case that it is hit. Actually, in recent google update seems like a lot of homepages are hit so that's maybe the case with your site.
About Page Rank - it will never be changed because google announced that they will not continue updating it. So until it is shut down it will show your previous PR. And currently, last update was like 1 year ago so now it is almost useless factor to check.
You can share url so I can check it a bit better if you like :)