What is the correct way to make layers from pre-existing tracks?

I have recorded and edited 6 single-clip tracks of the same live instrument.
 
I want to be able to play them back at the same time through the same effects, EQ, pan... etc. without having to fiddle with 6 separate tracks.
 
The ideal solution, I thought, is to copy them all to one track as layers.
 
But if I drag/drop them onto the same track; and then activate layers (or the other way around: Activate layers, then drag/drop),
 
...on my first attempt at doing this I ended up with a track that only showed two of the tracks,
 
...and on subsequent attempts I never even managed to get it to show only 2 tracks. It just stays as it is!
 
The layers button is definitely toggling as I click it (icon with lines changes), and there are definitely 6 tracks/layers in the one track (I can see them by peeling them back, so to speak), but I cannot get it to show all 6 tracks/layers at once! 
 
What is the correct way to create multiple layers in a track from pre-existing tracks?
 
I have X1b with the latest quickfix 255.

there's also a "refresh layers" option.. might be that your layers are hidding under one of your excisting layers.
when you "shift" + drag your layers to the new track then they should line up correct in time.

It sounds like what you really want to do is send a bunch of different tracks to a bus.  That way, you can tweak the levels on individual tracks if need be, but deal with all the fx and panning in the bus.

+1


I never use track layers for doubling up audio, because you have less control. Usually you'll want to EQ one a little differently, or maybe pan em a little. I highly recommend getting into the habit of bussing these bad boys. 

cheers,

Seems like the last 3 posters beat me to it.

Route your 6 tracks to a bus and apply your processing on the bus.