I captured my own PSK31 signal and it is not a pretty picture #ubitx-help #filters

Don - KM4UDX
 

So i finally got my SDR working at the same time as my uBITX while doing PSK31, and nothing blew up. Yea.
The picture shows big spikes off the center, if I read this right. 
Am I interpreting this frequency distribution correctly? I assume I should see a major spike and little else, correct?
Note, my sound card is at the lowest level I can set it. 
Is there something else I should do? I have to assume operator error is a major player here. hahah.

Join BITX20@groups.io to automatically receive all group messages.