#1
I replaced my tubes the other day and I'm not certain that I put them all in the right spots. I have a B-52 AT212 and there were two special tubes. One was supposed to go in V5, it said closest to the power tubes, so I put it there. But why is it called V5? Does the rectifier tube not count? And there was supposed to be another special tube in V11 so I assume that was the last tube slot?

The tubes are...
recto, power, power, power, power, balanced phase inverter? (preamp), preamp, preamp, preamp, preamp, preamp, and another preamp that I think is the "ECC81 for V11".

I'm pretty sure I put them in all right, but for some reason my two overdrive channels sound funny now. The clean sounds amazing now though.
#3
V1 is farthest to the RIGHT when looking at the chassis from the back of the amp. You go from right to left with the V number. I suspect that's what tripped you up.

The special tube was the rectifier tube (V11).
#4
Okay, so then I did it correctly. The retube kit I bought was for the AT 100 which is a mirror image of the combo, which is why the tube numbers didn't match.