A question about my weight scales.....?

alright so i am a 21 yr old male. i have two scales. one digital and ogue or dial scale. i use them ot weigh myself. alright the digital scale which is a taylor lithium gives me 293 as my weight and the dial scale gives me 300 exact. it confuses me. which one do you think is the more accurate scale. and one mor thing ive been trying to lose weight recently. so i need approx 3500 to 4000 cals a day ot maintain my weight probably a little more, alright so i eat approx 2000 cals a day with excersise. since ive been doing this my digital scale says somedays that ive lost 2 to 3.5 pounds some days. is this possible?