I have installed the latest Nvidia Drivers(314.22) disabled antialiasing, have advanced animations enabled, regenerated fsx.cfg, and set HIGHMEMFIX in the addonmanager to 1.
These are the only known solutions to this problem.
As you can see, you are seeing double FSDT jetways so, this is not a conflict with another scenery. Since we surely haven't put double jetways at gates, and jetways in FSX are entirely handled by FSX, the double one is generated because of a video driver problem entirely outside our control.
The only possible things left to try, is to be sure that, on top of having installed the latest driver, you also remove each and every video driver tweak you might have applied in the past, perhaps using a driver cleaner before installing the new driver.
Or, just go back to an earlier version of it.
The only thing sure, it's NOT a problem of the scenery or a conflict with another scenery so, don't lose your time acting on CYVR installation or search for a problem caused by another scenery, because it's 100% sure it's something related to video settings.