Posted: 08 May 2017, 08:57
Having this issue too. This is bad, as I love seeing multiple building levels in only a single group of a zone 

A feature rich city builder game for Android, iOS and PC
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I experienced this is Sandbox, not sure if also happens at Regular modeLobby wrote:That has to do with the amount of demand. The building manager can only build one type at the same time.
Do you play in regular mode?