Vigier Guitars

I have an issue with my 2011 tremolo.
when I do dive bombing, the G stringend to exit from the thin binary in the rotating part of the saddle causing a twang when released or, even worses staying out of the binary and getting out of tune.
It seems that the saddle is not parallel to the bridge and I cannot fix it playing with the screw.
hint?
thanks!
Francesco

What is preventing you to set the saddle parallel? worn out screws? stuck screws?
I'd definitely address that to put it back in parallel.
Remove the problematic saddle if needed, lubricate/clean* the screws so you can adjust the saddle as designed.
*You can use WD40, 3in1, or simply soapy water.
If the screws heads are worn or fail to unblock them so you can't turn them, then you'll have to find replacement screws (or saddle)

some close up pics may also give some hints ...
are both screws of that saddle touching the tremolo base, or is the saddle "one-leg" like a pirate?