Hi all,
Sorry to post this issue again, but I was hoping for some clarification so I can progress with my analysis.

I just have a question about the detrending and filtering. I have been looking at ROI time courses at various stages of detrending and filtering. 
I have noticed that after detrending, the linear trend does indeed seem to be removed, as is expected.
After filtering (.008 to .08 Hz) only (without detrending), I can clearly see the slower oscillations, although the linear trend is still present, as would be expected.