Slider cant select certain posts anymore

All of a sudden my slider is broken and I can only add some posts and others don't work when using posts as the slider source.

It makes no sense. Only 3-5 out of 10 or so posts are appearing in the dropdown menu to select posts. There's nothing different about the posts that work versus the ones that don't. They used to all work. I don't know what changed. Yes I did set a featured image for all of them.

http://swanksongs.com/

I really don't want to have to resort to custom slides because it would be more difficult for my client to add their own slides that way.

Here is a post I couldn't add to the slider.

http://swanksongs.com/pieces-of-my-heart-live/

Problem is not solved. I don't know how to undo "solution"

You can see I have many more posts than the slider allows me to add

(is there anyway to turn off "solution"? I clicked it by mistake because I didn't know what it was at first, but this topic is NOT solved)

Hi!
Slider shows only posts with a featured image. That is why your slider does not show it.
The post http://swanksongs.com/pieces-of-my-heart-live does not have the featured image.

Hello we have the similar problem. If we post a new articel, an older post automaticly delete from slider. But we want to see the old post. All images are featured and have been seen in past.

www.schultheiss-wohnblog.de

Hi!
You are right. To change this you have to edit file inc --> administrator.php (the line number 623)in the directory of your theme:

 $posts=get_posts('orderby=title&numberposts=0');

It should look like:

$posts=get_posts('orderby=title&numberposts=100');

It works fine - thx :)