Eevee evolution bug?

I renamed my Eevee "Rainer" because I wanted a Vaporeon but when I evolved it, it became a Flareon, I re-checked that I did no mistake in the name but everything was ok, is that a bug? did it already happen to someone?

I renamed my Eevee "Rainer" because I wanted a Vaporeon but when I evolved it, it became a Flareon, I re-checked that I did no mistake in the name but everything was ok, is that a bug? did it already happen to someone?

I renamed my Eevee "Rainer" because I wanted a Vaporeon but when I evolved it, it became a Flareon, I re-checked that I did no mistake in the name but everything was ok, is that a bug? did it already happen to someone?

I renamed my Eevee "Rainer" because I wanted a Vaporeon but when I evolved it, it became a Flareon, I re-checked that I did no mistake in the name but everything was ok, is that a bug? did it already happen to someone?

I renamed my Eevee "Rainer" because I wanted a Vaporeon but when I evolved it, it became a Flareon, I re-checked that I did no mistake in the name but everything was ok, is that a bug? did it already happen to someone?

I renamed my Eevee "Rainer" because I wanted a Vaporeon but when I evolved it, it became a Flareon, I re-checked that I did no mistake in the name but everything was ok, is that a bug? did it already happen to someone?

I renamed my Eevee "Rainer" because I wanted a Vaporeon but when I evolved it, it became a Flareon, I re-checked that I did no mistake in the name but everything was ok, is that a bug? did it already happen to someone?

I renamed my Eevee "Rainer" because I wanted a Vaporeon but when I evolved it, it became a Flareon, I re-checked that I did no mistake in the name but everything was ok, is that a bug? did it already happen to someone?

I renamed my Eevee "Rainer" because I wanted a Vaporeon but when I evolved it, it became a Flareon, I re-checked that I did no mistake in the name but everything was ok, is that a bug? did it already happen to someone?

I renamed my Eevee "Rainer" because I wanted a Vaporeon but when I evolved it, it became a Flareon, I re-checked that I did no mistake in the name but everything was ok, is that a bug? did it already happen to someone?

I renamed my Eevee "Rainer" because I wanted a Vaporeon but when I evolved it, it became a Flareon, I re-checked that I did no mistake in the name but everything was ok, is that a bug? did it already happen to someone?

I renamed my Eevee "Rainer" because I wanted a Vaporeon but when I evolved it, it became a Flareon, I re-checked that I did no mistake in the name but everything was ok, is that a bug? did it already happen to someone?