Yeah, I’ve confirmed this is intended. We give the stores the prices and then they do what they need to from their end to it based on exchange rates they’re using etc. so there will be slight variations between the stores.
The only way to avoid variations on the same server would be to not allow cross play, but we want our GooglePlay, Amazon, App Store and Steam players to be able to play together at their PCs and on mobile on the go and we know the community want crossplay so we have to work with the existing store systems and ToS, agreements etc.