The Relief Area must be in the General Area, but that doesn't apply to the area of stance and swing. As an example, consider a cart path down the left side, with 2 feet of grass between the path and the Penalty Area. A ball is on the left edge of the path, the NPCR is a few inches off the path towards the PA (for a right-handed player), and his resulting stance might be in the PA. His area of stance and swing is free of interference by the cart path, even though he'd be standing in the Penalty Area to hit the shot.
I've mentioned my story as a "Range Rat" for a year before- Dad would go and play and he would leave me at the range to learn the game. It worked- the first round was a 98 (13yo). And beat him by 6. I think later on he was annoyed AND proud at the same time. I never shot over 100, and he never did beat me. 4 years later I could shoot par maybe once a month with those original Northwestern Chi Chi Rodriguez Blades (half set- 1,3,5W's, 3,5,7,9, putter) I started with.
That's how you learn to center it and play all those in between shots. Learn on a half set of butter knives.
Day 276: Range work today. Started with my priority piece feels, then used that for set up and alignment work to various targets. Moved on to longer short game shots and finished with green side chipping.