Hi. Yes, it may well be published as Open Data, but that doesn't mean we have legal permission to copy it into OSM! In that case, we possibly don't, so would need prior permission to do so. 
Loading the "pins" (e.g. the 4 nodes that you have added as the corners of a building) is normal & how OSM works. 
Please stop mapping, as it looks like everything you have done so far will have to be reverted!