Unicode characters displaying as ? after import using WP Clone

I wanted to add this as a comment because I want to be brief, but SE will not let me do it since I just signed up.

Anyway, I just faced the exact same issue you are facing. This blog post helped me:

http://theblogpress.com/blog/seeing-weird-characters-on-blog-how-to-fix-wordpress-character-encoding-latin1-to-utf8/

As well as this thread:

Character encoding issue after changing servers

Good luck!