The conceptual model of the world will differ between systems

(written by lawrence krubner, however indented passages are often quotes). You can contact lawrence at: lawrence@krubner.com

There is nothing wrong or bad about this, but rather, this is healthy:

Decentralization of data management presents in a number of different ways. At the most abstract level, it means that the conceptual model of the world will differ between systems. This is a common issue when integrating across a large enterprise, the sales view of a customer will differ from the support view. Some things that are called customers in the sales view may not appear at all in the support view. Those that do may have different attributes and (worse) common attributes with subtly different semantics.

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