Package files for the Sims 4 are showing up as sims3.package files?

For some reason, under the file type they do show up as "Sims3Package" files, but they are Sims 4 CC and they do work in my game. I don't know what happened there, but all of my Sims 4 CC is working just fine. Haha!

Thank you both for your help, anyways. :)