And also, If I'm using nine unique sprites for my 3x3 grid..
This is a very wrong approach, don't do it! Use a single sprite with 26 animation frames (or animations) for letters. Copy this sprite 9 times to make 9 instances of this sprite, and place them in a grid. Again, all 9 instances should belong to the same one Sprite object!
Also, the only behavior that can push multiple objects like this is Physics, and I really don't recommend using Physics here.
Do what I did in my demo: