Something Strange is Happening in Peru....

Hi,

trying to recreate 'Into the Blue Simulations' epic mountain flight in Peru in the Boeing 247D from Chagual (SPGL) to the coast at Trujillo (SPRU) (https://www.youtube.com/watch?v=6JUQrSnzMbA).

I've created the attached moving map, and geo-referenced it using the SPGL and SPRU ARPs. You will see that PIAS airport in the South East is closely aligned, but others to the West aren't. When I try to improve the georeferencing by moving some of those to their true positions, SPGL gets moved a long way from where it actually is, and I can't find anything like a good fit. When I load this into MSFS, the airplane icon is off the page!

Interestingly:

a) some of the 'waypoint' airports included by Sim-EFB are not even on this portion of the Sky Vector map, and

b) It's the same if I enter the Lat/Long of SPGL and SPRU, rather than use the ARPs.

Any ideas? It works perfectly for Biggin Hill to Shoreham!

Thanks & BR

Paul