It sounds like you have had a lot of changes in a short time and cats don't like a lot of change.
You've moved their food and water, changed their litterboxes and the kitchen floor and sent Nuggets two best friends to a new home.
They may just need a lot of extra attention and reassurance that things will be back to normal now.
I know Samantha gets upset with change and it takes a while for her to get over it, hopefully with time and extra loving your kitties will soon be back to normal and we can have happy cuddling cat photos from you again.