I am trying to merge multiple shapefiles into one, but I encounter one error, not all of my shapefiles end up merged. I am able to load all of my shapefiles but when I attempt to merge them, the merged attribute table contains all the information that it should but not all the shapefiles show-up. I made sure to change the the headings in the attribute tables that I want merged.
I have tried to use a number of tools (Merge Shapefiles to One, MMQGIS Combine etc.) but the problems seems to be that some of my shapefiles are projected differently. I have tried to change the coordinate reference system under Properties but after I save the file, the shapefile disappears. I have also found a guide to use GRASS to change the projection but I was not able to follow it.