simple_fields_query_posts – multiple num_in_set option

Hi there,
thank you for this great plugin!
I currently have set up a repeatable field in a custom post type. Say the field name is video.
What I would like to do is simply query posts that have a particular video(id) as field and use the results (post title) as the title of the page. So that when i request a Video (post type), the code will look for the posts that have the requested video as a field.
This is what happens:
If the post has only one video, when I execute “simple_fields_query_posts”, I get the expected results. On the other hand, if the post has more than one video, what happens is that the resulting query is empty (no results) since the “sf_num_in_set” argument (which i don’t set) is setted to 1 by default.

I’m not able to retrieve that parameter before sending the query, is there something I am missing?

thank you

http://ww.wp.xz.cn/extend/plugins/simple-fields/