Hi Tran - I'm in quite a bind, as I need to export posts from one site to another (including its custom taxonomies as well). However, when I go to the site, then Tools > Export, and then select Activities (the cpt), I don't get any options, such as Categories, Status, etc.. And yes, the "Can export?" setting has a flag.
It exports an XML that contains nothing.
Please help! And FYI, I'm needing to export posts manually because I'm currently having an issue with my normal API (not related to metabox 🙂 ). And until it's fixed, my site can't get updated.