[Eeglablist] ERSP plots using study-level interface

[Jack ZHANG]

I am now using the EEGLab study design for time-frequency analysis. I find
a plotting problem when I use the EEGLab interface.

I have different plotting results (perhaps 90°rotated) when I select either
one channel or multiple channels.

I would like to ask if this is a potential bug or a problem with my
operation.

Best wishes,
Jack