Suppose you have some per-sample attributes on a mesh. For example, suppose you’re getting the texture map colors from another mesh like this:
The Show Values makes it look like you’re getting one color per vertex, but that’s not true.
If you do a Show Values like this (numeric), you’ll see that you’re getting multiple values (one per sample).
To see all the values as colors, you need to offset each Show Value. Otherwise they just stack up on each other, and it looks like just one color.