Yes it is confusing! From p62 you would expect one engine to remain in A/THR active...I will try it in the simulator this evening and see what happens.
The line you stated on 1.22.30 P70 (MAN THR) refers to the A/THR already being in ARMED status
I understand this to mean that if MAN THR is annunciated, then A/THR is armed - I don't think ARMED is a previous condition.
The (confusing) question is: will A/THR stay within the range between IDLE and CLB or will it use more than CLB if required (e.g. OP CLB)...?
The T/L position always limits the thrust, except in Alpha Floor - and OP CLB is not an A/THR mode!
Will post later/tomorrow after sim.
TP