Another thing that confuses me is the length of the graphs.
According to my screenshots, you can see that I have about 300 datapoints in my time series, (actually, it's 280-something). And from my timing file screenshot, the last time is around 450s, which, divided by my TR of 2.5, gives me about 180 datapoints.
The length of my HRF should be the length of the time series minus the length of the timing file? So the length of the HRF should be at most (300-180) = 120 points.
I'm confused, because the 8 graphs given by 3dDeconvolve are all about 180+ points long.