Header is cut from posts after enabling "use page/post options" in Atahualpa

Hello, I tried the Atahualpa SEO options and enabled the “use page/post options” option by choosing yes from the dropdown. This changed the article editing area a bit and I got options for entering meta data. I published the artice and the header looked like “This is my”, it should look like “This is my header which I made for that post”. As you see, its cut somewhere. I remember it was like this in the new area which appeared after I enabled “use page/post options”, but its even cut after I disabled the option and republished the article.

What am I doing wrong? How do I change it back?

Thanks