First someone needs to build one so we know if it works or not 
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Yes they all need to connect on the micro (and I expect they are not linked internally), but this was internal to Fritzing. In the part, in schematic all the power and ground pins are overlaid on a single pin (which is fine), but for routing to work properly the pins all need to be part of a bus so a connection to any pin is a connection to all of them. The bus definition is missing from the part, and that causes the routing issues. The svg files need some style clean up and then I’ll submit an update for core parts.
Peter