Sequence layer after effects problem

I'm about to go crazy. please help!

I'm trying to sequence my layers, and it's keeping all of them at the same start point, but making the dissolve I've added. I have no idea why it's happening, because I was able to do it right before. I picked the end point of the layers by using alt+].
I did manage to Sequence the layers by clicking "new comp from selection" in the project files, but then I couldn't set my desired duration for the layers.