i believe this is common, and more prevalent on the passenger's side due to collecting more from the edge of the road.
the bolt is seized in the metal shim in the bushing at the top of the shock. that's why it spins and spins after you've released it from the captive.
i made my hands bleed doing mine and it still never come out. what i did was nip it back in, and i'm going to get a replacement bolt from vw before cutting the seized one out so i can replace the shock.
the driver's side one, true to form from what i read, came straight off without any fuss.
I bought myself a DeWalt impact driver a few years ago, it seemed like a huge extravagance but I've found I use it loads. Even just taking wheels on & off it makes life loads easier and I seem to end up doing that quite a lot !