Multiple images of the same station

Rig is a FT-857d with SiganLink USB and wspr 3.0 under openSUSE 12.1
I am seeing multiple images of the same station. The signal is pretty hot in here.
Do they have a image problem with some type of SDR or it it on my end?

http://www.slhess.com/pictures/wspr-nasties.png
http://www.slhess.com/pictures/wspr-nasties2.png