[Qgis-user] QGIS Shapefile Structure (?)

[Springfield Harrison]

Hello All,

	I have been opening QGIS shapefiles in Manifold GIS and noticed that 
they bear very little resemblance to the same file in QGIS, in some 
cases.  When I then saved that file in QGIS as a different file, and 
opened it in Manifold GIS, all the features were present and arranged 
as expected.

	On another occasion, it looked like previously deleted polygons were 
visible when opened in Manifold GIS.

	And, in another instance, when attempting in QGIS to create a 
polygon, that failed.  Instead, portions of old, deleted polygons 
were reactivated instead!  What is going on here?  This does not look 
like trustworthy behavior.

	I tried using SpatiaLite files instead of shapefiles, but there edit 
and feature  creation failed outright.

	I believe this has been dealt with earlier; could someone point me 
to the discussion?  I did a brief search but could not find the relevant posts.

		Thanks very much, Cheers . . . . . . . . Spring Harrison