bro i think ur missreading something. TRAINING ARMS .. i.e. BI then Tri in proper days accordingly . your doin it in a manner to pre'exhaust the bi prior to bpulling motinos and pre'exhaus the tri' in pressing motions
let me show you.
FIRST 3 WEEKS, training arrangement
Training A: Chest, Traps, shoulders, tris, abs
Training B: Row, LatPull, Squats, Curls, calves
Last 3 weeks NEW ARRANGEMENT
Training A: Tris, Shoulders, Traps, Chest, abs
Training B: Curs, squats, LatPull, Row, calves
THE WHOLE objective is to alternate the ORDER OF PRE'EXHAUSTION.. not totaly change your training regiment for each day by swapping days.