I can lend some clarity to this and hopefully save some of you from the aggrevation of repeatedly re-timing that i went thru with this job
Let me begin with some clarification on the cylinder numbers and bank 1 and bank 2...
Bank 1 (cylinders 1-4) is the Passenger side and cylinder 1 is closest to the radiator
Bank 2 (cylinders 5-
is the Driver's side and cylinder 5 is closest to the radiator
When you lock your crank with the balancer timing marks aligned to the timing belt cover cylinder 5 is at TDC, Not cylinder 1, this is important because the hydraulic cam tensioners are different part numbers for the different banks they function differently and it's very common for techs, not to mention shade tree guys like us, to put them on the wrong sides which will cause you to throw the 17748 and 17755 vag code for incorrect cam/crank correlation.
When counting rollers between the timing marks the number is 16 rollers for both sides, the confusion comes from where to start and stop counting because the rollers and the marks don't line up perfectly...
The cam locking bar will always force your exhaust cam timing marks to be perfectly aligned with their cam caps so always start your roller count with your exhaust cams on the bench from the 1st roller to the Left of the exhaust cam for both banks.
For bank 1 (passenger side) starting 1st roller to the left of the exhaust timing mark count your 16th roller should also be just to the left once you re-install this side i have always found the timing marks to line up perfectly with the cam caps after the tensioner is released.
For bank 2 (passenger side) starting 1st roller to the left of the exhaust timing mark count your 16th roller which will land almost perfectly with the timing mark on the intake cam...if you count the rollers inside the marks instead you will come up with 15 between the marks which is where the confusion comes from. Once you re-install this side the intake timing mark on the cam will be a little advanced(closer)to the exhaust cam, the pic in the previous post shows this pretty well.
After you've re-installed i'd recommend leaving cam caps tight but don't torque and stretch the bolts until you've run the motor, also let the motor sit for 30 minutes or more before turning over one or more crank revolutions by hand clockwise, after you line up the balancer marks with the cover and re-locked with the cam bar both intake cam marks should line up, passenger side always looks perfect to me driver's always seems a little past the cam cap mark if either intake cam mark isn't real close chances are the chain timing is wrong.
After you run the motor and it doesn't throw any correlation or cam codes take the valve covers back off and torque and stretch the cam cap bolts, also don't re-use cam bolts they are stretch bolts there are 26 per side 52 total the VW p/n is 077 103 460 they're about a $1.40 each