Short Version:
We are using a CC BY 4.0 license, but Open Data is changing it to a CC BY 3.0 license.
Details
For example (as of 1/20/2016, at 10:45 am), our ArcGIS Online feature layer "Parcel Situs Address" is using a 4.0 license:

That content comes from the HTML embed code that comes directly from the Creative Commons site:

However, when that same feature layer is viewed in open data, the hyperlink applied to the CC-BY image is changed to the "3.0" license:

Can anyone shed light on what's going on here? The 4.0 license very similar to the 3.0 license, but it's definitely not the same.
ArcGIS Open Data ArcGIS Open Data community