Why are the Field Museum's mummies in no obvious order?

I will pass over briefly how the vast majority of Egyptology is grave-robbing, which is creepy. And we can't even pretend it's not, because we display the bodies. (And, yes, I understand, it's educational, and I've toothbrushed off my share of human bones, and yadda yadda scholarship knowledgecakes. Still creepy.)

At the beginning of the exhibit, they tell you that they will move chronologically through the burials, from the early dynasties to the later dynasties, and thence to the Hellenistic and Roman periods. And maybe they do, if "moving chronologically" means "placing in an order only obvious to a fly on dexies." I even tried to be a virtuous museum-goer and follow the plaques, but even that proved impossible, because there was no single path and I found myself very quickly jumping forward into Ptolemaic burials no matter what I did. It was like that Choose Your Own Adventure novel when you automatically got the bends unless your choice was "throw this book away before your character puts on the wetsuit."

If your plan is merely to chuck the mummies in a room and let the visitors figure it out, because after all most of them are eight years old and thrilled just to see old dead things that will probably curse them, that's fine. A somewhat strange curatorial choice, but fine. It's the mendacity that gets me.

Also, well done, Field Museum, on the captions hung five feet away from the visitor, inside a glass case, in the dark. Those were really useful.