Blogger is not updating web pages correctly -> the fix

I've just discovered that nothing I've published since Dec 11th is appearing on the primary web page (front page) of Gordon's Notes.

My posts are all visible in Blogger, they are being published, they are appearing in the monthly indices, they show in my feeds, but the main page isn't displaying them.

Weird Blogger bug. I'll see if I can fix it by switching templates.

Update: It was easy to fix. I made some small edits to the most recent post that displayed on the main page, then saved it as draft. All the missing posts then appeared on the front page. I then republished the "bad" post and all seems well. If that hadn't worked I would have tried editing the oldest "hidden" post.