I'll be sure to check out those videos.
The single saber appearance is a bug that occurs with the new Cartel Market Saber.
Also, on the topic currently in discussion in this thread... Shadow Tanks need to be nerfed, (take it from 2 shadows), along with a few other class/spec combinations that are a little on the powerful side.
IMO: Commando DPS needs some mobility buffs, Scrapper needs a slight damage buff to keep it at the level of Infiltration.