Does Slice Assembly order matter?

My computer has been taking hours to assemble slices so instead of testing it out myself, wanted to see if someone knew it off the top of their head. When you add products to the assembly window, does it matter which image is on the top of the list? Yesterday I had a problem where the images were all backwards, but I was busy and frustrated with how long it took at the time and just dropped it, moved on to something else. Before I try again, want to make sure I am doing it correctly. They were definitely in the same path.

Another side-question, is there a function that seamlessly mosaics products in different paths (a horizontal counterpart to Slice Assembly)?

Hi @rbiessel, did the order matter?

I can report: in current SNAP 6.0, order seems not to matter.