combining atribututes

Thanks for this plugin, i appreciate your work.
I’m trying to combine two attributes without luck, searching or trying everything i can think of

[display-posts post_type=”goals” author=”current”]

the results satisfy either condition as if specifying post_type OR author
when i use only post type i get the correct results
and when i use only author=current i get correct results.

Can you tell me how to combine these search terms?
My post_type is created as a custom post type and the posts are created via a wpform using the user posts addin.

Thank – Peter