Connection of Blogger and Google+

This behavior isn't configurable. Both the current editor, the draft editor and the "old" editor use a combination of BR and DIV tags when they should be using P tags.

It is a mind boggling decision, and it is utterly wrong. It explains a lot of the problems with inconsistent paragraph rendering in Blogger. Perhaps it works in IE, but it doesn't work consistently in webkit browsers like Chrome and Safari.

I think the newest editor inserts two consecutive BR tags, but the older one inserted a single DIV and a single BR.

Microsoft's Windows Live Writer does things correctly as noted above. MarsEdit for OS X is less consistent, I think if it starts with a Blogger authored post it gets tag confusion.

I feel your pain.

No, you cannot change it.

If you do choose to create a new post and move the old content (best done by copy/pasting the HTML), then you could set up a custom re-direct from the old post to the new one, using the features recently introduced for this.

Sometimes I just keep the old post, and put a note at the top saying to see XXX for an update. This is nice if the old answer was key-word rich, but the new one is so simple and elegant that you can't relatistcally work the keywords into the post.

Update: this question, and a couple of posts in the Blogger product-forum, inspired me to write up a fuller answer. In case it's interesting to future readers, you can find it here: http://blogger-hints-and-tips.blogspot.co.uk/2012/07/take-numbers-out-of-blog-post-web-address-urls.html