I suspect most people happening upon this post would have a hard time figuring out which illustration is the one you call completely random, and which is normal. That is, unless they remembered your fascinating project with CD labels:
[one.imports.literateforums.com/t/ideas-for-targets-too-large-for-product/977/11)
To others more familiar with flatbed scanning and large format photography, the second image is rather familiar:
LOL! You just happened to come upon the exact number of patches in a Hutchcolor scanning target. MeasureTool has a few of these industry standard targets hardwired into it. Apparently anytime it sees 528 patches it assumes it’s dealing with a HCT target. Similar things happen if you have 918 rgb patches and 1617 cmyk patches I’m sure.
Guess you’ll need to find a way to add one more patch?