Weird fuel correction D5244T XC90 I (275) 2003

[npexcept]

Hello Folks!
I'm new to this site. Reading without an account for quite a while tho.

Had quite some problems with my D5244T because of things the previous owner did (he didnt know what a torque wrench was)
But now it's running quite well I think.

When fiddling around with VIDA I ran the injector test and got some interesting results.
While the compression and combustion tests looked good, the fuel correction test did not.
After hours of research I dont know to fix this problem, if it even is one.

Here are the test results:
Compression: all cylinders between 195-199 rpm, looks healthy
Combustion: 718, 730, 702, 694, 666 rpm, with cyl 5 being the lowest.
Fuel correction: 6.94, 6.58, 5.99, 0.0, 33.73 mm³.
The engine runs okay-ish to fine, just some slight knock and a little blowby.

While searching I just found only this one forum thread (https://www.volvoforums.org.uk/showthread.php?t=158592).
Some person over there said that this was a "popular pattern" with correction: 7, 7, 7, 0, 36 mm³ or so.
But no explanation or such. Just guesses that that test dont work correctly.

Do you people know something about this correction pattern?
Did a return flow test quite a while back and dont really remember the results, nothing special iirc, will do one again soon.
Would really appreciate more info on this!

[npexcept]

today I've swapped that injector #5 and still get around the same results with that injector test
Engine runs great so it's fine I guess.