I am trying to merge two shapefiles which both contain polygons representing properties in QGIS 2.2.
One problem is that the names of some of the columns in the attribute table differ between the two files. They contain the same information, but two of the column names are different.
I tried making two new columns in one of the files, and copied the information from the ones with the wrong names. Then I deleted the column with the wrong names.
The resault was two attribute tables with the same column names but in different order. When I then tried merging them, I lost information in the attribute table.
What can I do differently to prevent the loss of data when merging shapefiles?