Hi!
I just noticed that for some reason Detective Comics Vol. 1 #846A & #847A have an identical cover (both have the cover of 847). I also believe the newsstands are blank (i don’t have them but i thought to check in case they needed correction also).
You might want to reupload 
I am looking at the entry in Core but I dont notice anything strange?
And we don’t have an image listed for the Newsstand versions, which might explains why these are missing.
edit: I managed to find an image for the newsstand edition of #846 and added it just now.
Hi,
I think you might have corrected this already, as i refreshed the issues a while back and they started showing up correct . Thanks for looking into it.