[Plugin: W4 post list] List is showing the posts within the first 6 categories only

There seems to be a bug in W4 post list.
When I select more then 6 categories to be shown in a list with type “Posts with categories” the posts inside the 7th, 8th, 9th.. category are not being displayed.

In the W4 post list control panel, I have selected all the posts within the categories to be shown, but after saving.. only the posts inside the first 6 categories are still checked, posts the 7th, 8th, 9th.. category are no longer checked.

Example: http://www.moviis.com/list/
W4 post list Version: 1.5.2

http://wordpress.org/extend/plugins/w4-post-list/