[Qgis-user] Why does qgis ask grass-vector's about coordinate reference system?

[Nikos Alexandris]

Dear all,

* I opened a grass location within from qgis (based on epsg:31466)

* I load a grass vector map and a dialog asking for the projection
system appears (Define this layer's projection).

Question 1:
Why qgis "asks" about the coordinate reference system since, we all
_know_ that there is one and only reference system for a GRASS location?


* I did no pay attention to that so, a few weeks ago, I saved a grass
vector map (projected actually in epsg:31466) as a Shapefile.


* While saving the Shapefile the dialog "Projection Selector" appears,
which asks for a choice and "promises" that  "The data points will be
transformed from the layer coordinate reference system".

* I discovered today that this Shapefile obtained the wgs84
"tag" (reading the .prj file) but the spatial extent (reported by
ogrinfo) was something too big to be degrees:min:sec.

Question 2:
Should there be a transformation or not? 

I think it's a bit confusing to ask for a grass-vector about its
coordinate reference system. Or is it my misunderstanding?

Kind regards, Nikos