no, don’t touch the screws underneath. As long as you haven’t touched the screws underneath already, then the vat is aligned with the printer and the laser to be flat, it’s just your printer not aligned with the world! Like I said, adjust the level of what it is sitting on, not the VAT.
Try a lower Z reset. If you have changed the screws already then using the “stock” numbers don’t work, as we have nothing to go on. The stock numbers are based on not touching the screws.
If you have touched the screws, try and reverse what you did, if you aren’t sure then technically could use the original build plate to get the VAT level again, then go back to trying to level the easy level plate.
If you haven’t touched the screws yet, or haven’t touched them much try a lower number, lower it by another 5 to see if the screws sit in the middle, if not, try again lowing it another 5.
You will then need to print the level cylinders and might need to adjust it a little after that as it might be level, but still pushing too much/not enough.