How come we did not break the record of the snowiest winter ever in dallas,tx on 20/21/March/2010!!!!?

Yesterday (march/21/2010) we got 5 Inches of snow in Dallas,Tx were I live, so we should had broke the record for the snowiest winter ever but I found out that they mesured it as 1.3in only so the total snow this winter is 17.1 inches which was actully or suppose to be 20.8.Okay it was a total of 15.8 before yesterday's storm but now they measured 1.3in from the storm, but in dallas we got way more we got 5in I even made sure that I went outside and it was 5in so this winter in dallas we should had a total of 20.8 Iinches and it was measered 17.1in.I had asked my friends and they said that that is because they measered it in the DFW airport not in dallas.the old record snowfall in dallas for the snowiest winter was 17.6. But they should had measered the snow in dallas too which was actully 20.8 Inches not 17.1in !!!!