My b2evolution Version: 3.3.3

I am having a tough time with intro posts. I found that intro-sub was overriding intro-cat when I just wanted intro-cat (it's a page for the main category). Then I thought I had the answer -- if I made the intro-cat newer than intro-sub, it would show.

However, now it appears that if the disp_detail is posts-next, it will show the intro-sub for one of the subcategories on that page. I tried adding:
case 'posts-next':
$restrict_to_types = '1520,1570,1600';
break;

to get_featured_Item but it didn't seem to do the trick.

I am having this problem on regular b2evolution files or stub files.

Here's an example:
http://www.seniorwomen.com/news/index.php/ca
shows the intro-cat for the main category culture and arts.

If you go to the next page:
http://www.seniorwomen.com/news/index.php/ca?blog=5&cat=15&more=1&c=1&tb=1&pb=1&paged=2

it shows the intro-sub for Music instead of Culture and Arts.

Anyone know how to get intro-cat to show all the time when on the main category instead of the sub category when you aren't looking at only that subcategory?

Thanks!