my mac desktop doesn't allow me to move items, when i go to view options and set the arrangement to none or snap to grid, i still can't move it. Every time i try to drag an item to another place on the desktop, it just jumps back to its original spot. The only way i can sort them out is to arrange by name, date, kind, etc. But even though i do this, i can't manually drag them and place them around the desktop. i don't know what's wrong! 
This is what it looks like on the "Show View Options"

This is what it looks like when I drag and Hold.

This is what it looks like when i release. (it jumped back to its original position)

This is what it looks like on the "Show View Options"

This is what it looks like when I drag and Hold.

This is what it looks like when i release. (it jumped back to its original position)
