Hi, Welcome to OpenStreetMap.

Unfortunately you placed a new highway on top of the 'highway under construction' making duplication of the highways. It's OSM practice that amendments/corrections to features, (highways) are made where possible (here) to the existing feature. Thus duplication is avoided and all mapping history of the feature is maintained.

I've removed the duplicates, updating features with your new info, all's now well.

Regards Bernard.