I have got the same problem.
To test it, I made 2 test lists having only one email address each. Both are my email. I selected these two test lists and sent a test newsletter. Only one list was delivered i.e. only one email address. In the report, it showed only the email of the sent list.
Would you please check it and suggest what should I do? Will you check why the system cannot delivery multiple lists?
Thank you
