First off, it's best to stick to the same topic thread, otherwise it gets chaotic.
I'm not staff, but a volunteer on the forums, but I've done several imports in my own blogs over a few years here and I know how glitchy the process sometimes can be.
When the imports have been in progress have you looked in that blog's dashboard at 'all posts' and 'all pages' at all? Because you should be able to see how many of each have arrived in the blog by clicking your browser's refresh button after a few minutes of a few more arriving. This would at least tell you if it's working at all. If they are arriving slowly, then just wait. If they aren't, I would suggest that you split your exports up into smaller, more manageable amounts, for instance by assigning specific categories to groups of posts and then importing each of those at a time. That's what I've had to do occasionally.
The thing is with the 'processing' message - it can be processing fine but not actually tell you that it's finished, you need to check what's actually happening in your blog. Try that, and if it's still not working, come back and ask again.
You can also do a search here or on Google to find out if a solution to this problem has been found by anyone else - save yourself a lot of time waiting for responses!
To search on Google, type
then leave a space and type a keyword or words to do with your problem. If more than one word, put them in double quotes, and if more than one word or phrase, leave a space and do the same thing, like this
site: en.forums.wordpress.com "import still processing" "problem"