My blog was BIG, and no one ever, not once, complained it was slow loading.and the reply
It's (almost) unbelievable how long Google is taking to flick the switch and restore things to how they were pre auto-pagination.
It appears that you have done a lot of copy-pasting from MS Word into your blog, and unfortunately doing so will add a very large amount of unseen (but still 'heavy') HTML tags to your post.
If you look at the source code of this very short post (http://naturealert.blogspot.com/2010/02/bbc-news-panorama-palm-oil-products-and.html), you will notice the huge amount of garbage that MS Word adds.
If your blog is big (but not that big), and lacks huge amounts of text and / or pictures - and you're still seeing segmentation of the archives or main page - and you use MS Word for composing your posts, this is a possible reason why your blog display is being segmented.
Whether Blogger can actually filter MS Word ML code, before generating the blog display pages, is an interesting question. You might be better off removing all MSWord generated meta code on your own, if possible. Better yet - always paste content, unformatted (Ctrl+Shift+V).