Yesterday I went on my 2nd run with my new Garmin 245 music watch. I ran my usual 12.5k run. I noticed between k 6 and k 7 my watch beeped way too early. I looked down and it said I just ran just over 3min k lol. For the next 3 kilometers it recorded similar numbers. At the end of my 12.5k run, it had recorded that I ran 14 kilometers. It was the correct duration, but very frustrating. Does this happen often? Is there anyway I can fix it