Howdy!
I might have accidently used the term 2 strong side holsters myself, but....
In terms of holsters, we are normally talking about either straight holsters or cross draw holsters.
A strong side holster is a straight holster either on your left or right side depending in which is your strong hand (left or right handed).
Hope I didn't confuse you more than you already are. If I did, Marshal'ette will be in touch...