Trying to put Coin into Registry, when Registry says its already in. 0

[Mikey Siegel’s impeccable collection]

I noticed that my Kennedy half dollar, 4355736-001 is not in my set.  When I put the NGC number in, it comes up that its in the set already, even tho it is not and says "see coins" as if its not in.

[Ali E.]

23 hours ago, Mikey Siegel’s impeccable collection said:

I noticed that my Kennedy half dollar, 4355736-001 is not in my set.  When I put the NGC number in, it comes up that its in the set already, even tho it is not and says "see coins" as if its not in.

Hello, Mikey.

This cert. number was successfully added to one of your sets on Feb, 21, 2020. You may add it to other sets, if you wish.