Instead of "Pick all" use "For each", and this way you can get to compare the distance the way you did it for each instance.
In this case you need to specify you want the "compare two values" condition to be applied to all instances.
On another note, capx files are already zip files. It sounds like all your host wants is a renaming to .zip not an actual compressed file.
"Pick all" helps to get back to picking all the instances of an object type once you're already deep in an event/sub event that was picking only a specific instance and you find yourself needing to pick "back" all the instance, and possibly specifically pick them again.