The cloner doesn't import my whole blogposts

I'm trying to clone a test site (on wich I have worked on a new design avada.tigressart.com) into my original domain http://www.tigressart.com. It is a mulitsite. And the cloner does everything fine, but not the blogposts. It never clones all 175 post, but only partly. I tried it several times, but it doesn't work. The last time it only cloned 9! And it never gets the categories right. It mixes them all up!
I'm quite frustrated and your help is highly appreciated!

Nimue