I tried your test-environment - no problem, no delays or anything.
But when I try them on a real track with several channels and busses I have this issue.
f.e. I put one on the bass-Bus and another on the Kick/Drum-Bus.
then the Mid-Bus (without any compressor) seems 1/8 ahead of the other both busses.
it seems as with compressors on the busses, these busses are 1/8 to late.
Not a flanger or chorus delay - a real "to late" delay
and another issue I've seen: when I choose the presets direct on the GUI of the compressors: no problem.
When I choose the presets on the Ableton-Effect-GUI: nothing happens. The words change - but not the switches on the compressor itself...
that's the first time I have such issues with a demo.
Any idea how to resolve?
Just for information: I just installed the vst files.
And beside that: after playing around for 2 hours with them: it really makes fun to play with these compressors - and it sounds good.