La Bella HRS-XL El. Guitar RWNP

When I first put the set of this strings on my guitar and looked at them closely they were deformed in some places. they had weird little bends on them. I fixed this problem by leaving the strings on my guitar and slowly increasing string tension this straightened most of defects. There's another defect in this set of strings (I still don't know how to fix it) - if you look at wound strings you'll see that there are some places in which they are thicker then in the over places. How could they leave the factory? Is it a quality control problem or an ingenious technology which is far beyond my understanding? Even if it is some sort of technology it causes fret buzz...