So with the one I had today, should I have done any random drill of my choice in the sets where it just says “drill”?
I also noticed that it outlines 100m of swims for the warmup, but gives you 3 x 50m (150m) of actual reps - is this a mistake or am I understanding it wrong?
Oh and yes, the 50, 50, 50 to equal 100 does seem like a bit of a bug, otherwise all your other questions appear to have been answered. Good luck!
PS. YouTube videos of misc. drills can be really helpful and give you a menu of options. Fingertip drag, tombstone kick with the kick board vertical in the water, shark drill for rotation, fist and finger drills, catch up drill, etc.. Enjoy!