Why two Zubats with same CP has diferent CP bar?

Why two Zubats with same CP has diferent CP bar? - Man in Brown Dress Shirt Standing Beside Woman in Red Dress

In the following screenshots I have two Zubat pokemons with same CP, can someone explain why the CP bar is not in the same position?

pokemon-go

Pictures about "Why two Zubats with same CP has diferent CP bar?"

Why two Zubats with same CP has diferent CP bar? - 2 Women in White Karate Gi

Why two Zubats with same CP has diferent CP bar? - Woman in White Karate Gi

Why two Zubats with same CP has diferent CP bar? - Grayscale Photo of Man in Black Leather Jacket

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