I don't feel at all qualified to say much on this subject, Ive only been to Trethevy once and that was a few years ago, nor do I know a great deal about archaeology or arcaeoastronomy(just what ive seen on tv and in the few books ive been able to afford).
But some things I do know, if you stare long enough at something you will see what your looking for, in all aspects of life. You said in one post that you stayed on site for four days, and that the stones speak in a language were only now decoding, may I suggest that the lanuage being spoken is Gobbledy-gook and the message is gibberish, four days on site would be almost a torture, no wonder your beginning to see things in the stones.