Meikleour,
I think we are in agreement. Thrust is set to idle by the combination of FMGC, A/Thr and FADEC. Spoiler deployment is a function of the TL position - and a few other things. Good innit!
Cheers
mcdhu
PS I went from clockwork 146s to the 'bus (some years ago) and, because I have never experienced TLs that move under the influence on Auto Thrust/Throttle, it has never been a problem to me. I guess it is what you are used to. ''Pilots like what they know.''