G'day everyone!

Very often I receive results from my solar exposure analysis that I believe cant't be realistic. So I set up a very simple model. 1m² facing east, 1m² facing west, 1m² horizontal.
With that model and the brightest day in Sydney I experimented a bit what is influencing the result and what is not. I chose the brightest day of the year since the irradiation on the eastern and western surface should be very similar with the given weatherdata.
The results of the first model - Ost-West.eco - seem very strange to me:
east: 1557 Wh/m²
west: 3596 Wh/m²
horizontal: 8269 Wh/m²

after playing around a bit I got better results (see 080702Ost-West.eco):
east: 3490 Wh/m²
west: 3692 Wh/m²
horizontal: 9606 Wh/m²

All results are from the solar exposure analysis but with solar analysis I had similar problems in the beginning.
Now, in the beginning I thought that after doing an inter-zonal adjacencies calculation the results became realistic but when I tried to do it again in "Ost-West.eco" I failed.
Can somebody tell me what I did right by chance?
What steps do I need to take in "Ost-West.eco" to get the results from the other model? This is an easy model but I couldn't always check on correctness with my other models.

Thanks for help,
Thomas