I have had simmilar problem as you due to those f*cking chinese camlocks. I had to do whole job 3 times to get it right.
The way I did it is that i didnt tighten the camlocks completelly, because they dont fit properly anyway... I have set all four camshaft according to marks on the right end of the cam .
Method that came up with was to place a 0,5mm feeler gauge flush on the cillinder head and then wiggle the camshaft until the gauge fit perfectly into the mark groove. Then i tightened camlock to hold it in place.
It is not an ideal method but apparently it is still more accurate than those ****ty locks. Engine rins smooth since then.
Also I would recommend to use loger bolts than original to fasten the locks because it is possible to strip threads easily with them as they only reach few threads. I was so ****ed when this happened to me had to put thread insert in there.. it was a nightmare.
Mine english is.. well not that good, so if you dont understand, let me know and i will try to describe it better
EDIT: all camlocks are supposed to be facing recessed side to the timingbelt "SX" mens sinistra=left "DX" means destra=right, X-CIL is the cylinder number, A is aspirazione=intake , S is scarico= exhaust
I possibly might find photos if U need that