Thanks for your question.
When you move up to the next pattern, the root note isn’t actually changing, that’s where you might be getting confused.
All you’re doing is starting on a different note of the scale.
So instead of going 1,2,3,5,6,1 (position 1) you’re going 2,3, 5, 6, 1, 2 (position 2), etc….
If you want to play the same idea with the A note being the root, you’d need to start with position 1 on the A so then you’re playing the A major pentatonic scale.
If you have any other questions let me know. Hope this makes sense.