I just watched and listened to a live presentation in our church yesterday by one of our pastors in our conference and heard that there was more than one type of cubit measurements with one that they think was used back then being called "a royal cubit" which has a longer measurement than the one used today.
As I video-taped this presentation, but haven't yet uploaded it to our YouTube channel, I will plan to do that today and review the section that was presented on the cubit measurements.
What GC posted here is most interesting and also makes a lot of sense. In fact, I will share his post with that pastor.