Wii Flow Covers dont display correctly

I have downloaded my covers from GameTDB and put them in correct folder on wii flow on sd card and they are coming up but are not filling the cover box properly and i have tried and tried but have no idea how to correct this is there a setting u need to change even the hd covers dont look great is there a way of shapen the image to look high quality im in uk etc oplease help guys

I always just download the covers from inside WiiFlow settings. Then it will download all the covers for each game. And put them in the correct folders for you.

You most likely have them in the wrong folders. Like the 2d cover in the full cover folder or something. I never had much luck when trying to do it manually.