One last thing. It must be related to the LightView add-on, because when I used the default layout of Simplest Gallery (no labels), it shows 5 images, like I asked for.
Oh, and also, when I view my gallery, the code says it’s loading the 150×150 pixel images, but the thumbnails are being stretched to 260×260. (So the image is blurred).
I’m using the LightView add-on by the way.