While adding multiple raster and vector layers (and setting them all in CRS WGS84) in QGIS 2.2, they don't seem to overlap. Interestingly enough, only raster files overlap between each other, the same for vector layers. My 'on the fly' projection is included.
As a "hint", raster layers coordinates are 6 or 7 digit numbers, while it's 2-digit numbers for vector layers (area in central Italy). Also to mention is that I'm completely new to GIS so every answer is good enough. Thanks