Why 9 Gems in heist?

I found a strange phenomenon in very hard heist.
of course all the available 10 games are required to be protected, but for some reason the available gems are only 9. I don’t understand why this happened to my heist, but obviously this is very strange. Heist is finished and I want to try to join someone in the same mode, and she have 10 gems for ready to protected.
try to count how many in the first and second pictures.

My heist

Other people heist.

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