Map 5 is an auto tuning map. That's why you are seeing different boost all the time. Different environmental factors such as ambient temp or heat soak will cause that. If you want more consistency try running one of the maps with a set boost target. With e85 you you may have to log and make some open loop fueling adjustments while on those maps.
I do Installs and flash tuning in South Florida
-2008 335i SGM on Terra 6mt
-1997 Jetta TDi 16v ABA Pt6266
-1997 M3 Pt6766