How to move the assembled parts to line up with planes?

Hi,

I did my first assembly but I dont know what I did wrong so all the parts are not lined up with the planes so when I tried to do an exploded view and moving individual parts ,the moving direction does not line up with the coordinate on the bottom left corner of the screen.

I tried the new coordinate placement but that didnt fix my problem.

how can I fix it?

also what can I do to prevent this from happening in the future?

Thanks

Alex

SolidworksAssemblies