Frequency band data different from industry standards?


I used Muse Monitor to gather data and plotted this for TP9 from the raw data. Could you please clarify,

  • Why do we see double peaks
  • Why do we see peak at about 460Hz
  • Is the frequency filter notch at 60Hz or is it a band with a range?
  • Why do we not see a clear downward sloping chart?
  • The alpha range seems to be in line with the industry standard but the higher frequencies are not. Why is this?

Thanks for your response