VGS not Sqn
As I mentioned earlier, it's "Volunteer Gliding Squadron", not "Squadron". Numbers are irrelevant.
Using another VGS as an example: 617 (currently disbanded).
617 Sqn is a real RAF flying squadron.
617VGS is 617 Volunteer Gliding Squadron.
So it can clearly be seen that there is no conflict on numbers.
One is a Sqn. Other is a "Volunteer Gliding Squadron". That is the title in it's entirety. The appropriate abbreviation is VGS, not Sqn.
Exactly where does the confusion exist?