Need RunKeeper help for walking

NVgal

I must have messed up the settings for RunKeeper and not sure how to correct it. I'm a walker. The other day I hit start, got the prompt to Start Walking and then got a reading just a few steps later at 9 seconds. Then today I got the first reading at the 5 minute mark, which is how I have it set, but the reading was way off. Said I had gone a half mile and my mph was 9 something. Usually at the first 5 minute mark I have gone just over a third of a mile at about 15mph. I just can't see what is wrong. Should I have it set for speed or pace? Any advice will be greatly appreciated. I tried MapMyWalk and I don't care for it as much as RunKeeper.