I have to agree.....sounds like they never went shopping because either something happen to them before they could get there OR they never planned on going shopping to begin with.
I have been following the missing British girl’s case...it seems like she also disappeared into thin air...
I found references to Illinois in some blogs I found about Ada and Mary Ellen.
One person wrote something about a picture of a car in Illinois which he said he had forwarded to police.
Another claimed to have seen Ada and Mary Ellen in Effingham, Illinois at a Hardee’s restaurant. I think he said it was on May 6th or 7th. He said he had reported the sighting to police. He said Ada was the dominant one. That Mary Ellen was helpless without Ada’s assistance. He said Mary Ellen was wearing a top like the one in the poster.
I discounted the one about the car. But, then I found the second one. I doubt they would be this far away; but, it does make me wonder after reading the second one.