Well some folks are going to say that entering VRS in still air and zero rate of descent is impossible.
Fascinating Captain to quote Mr Spock
I wonder if there was some convective updraught that brought your downwash closer?
It doesn't matter, you were there and experienced it repeatedly with time and height to experiment a bit.
Would it be fair to say you never got it out of VRS in 50' -100'?
I can imagine a light 350 doesn't produce a very powerful downwash - I've only flown the BB version.