Source Tape ignoring in/outs

So, I'd LOVE to be using cut page more, as I think the source tape is BRILLIANT for dealing with loads of footage.

But... I set an in, I set an out, I overwrite, insert, overlay, drag down, no matter what... Davinci always places the full clip, ignoring the in and out. Is there a setting I'm missing?

Thanks,
Chris

I can't duplicate this in Studio 17.1.1 for Windows. Seems to be working fine.