Hello. I recently analysed survey diagrams of the curvi-linear graveyard platform at Overchurch , Upton on the Wirral. The original church was Norman (possibly Saxon) but the platform appears to be much older. I analysed the platform geometry and found the site of the Norman church and its shape was related to the platform. In your words the church position 'respected' the geometry I believe was once marked by several stones. (Only two remain). The platform sits near the centre of a vary larger circle of (at least) 7 stones. See my book 'The Overchurch Mystery'. Perhaps there was often an accommodation between the incoming Christians and the local pagans? The Overchurch site features appear to mark the 4 old cross-quarter day festivals for example.
Professor D P Gregg (retired)