Help!! Double band in genomic dna - (Oct/29/2013 )

Hi

I used qiagen dna extraction kit to extract dna. And i found 2 band in my genomic dna when i run gel electrophoresis to check dna quality.
There is a faint low molecular weight band under genomic dna band. Anyone ever faced this kind of problem? Besides, will it affect my downstream application (pcr etc)?

Could you post a picture? How big is the band? What organism did you extract the DNA from?