I'm trying to make a standard choropleth map using numerical data. The base layer is a shapefile and it is joined to a csv file. There is also a csvt file to make the formats align.
When I go into the properties panel and select "categorised" on the renderer, the numbers in the value column line up just a bit oddly -- that is, the value column runs 0 10 100 101 102 etc... 109 11 110 112 etc... 12 120
... The colours line up appropriate to this order, which is obviously way, way wrong. Any ideas what I can do to fix this?