There's a lot of confusion in this that needs to be cleared up. First, Simple & Sinister is 100 one-handed swings, done in sets of ten, in 5 minutes, not a mix-n-match of two handed swings, sets of 5, and long rest periods. Then you get one minute rest and begin your Get Ups, which you must complete in ten minutes - 5 per side. So the goal is for this to be done in 16 minutes, not 30 as you stated. Once you can reliably hit these standards with a 32 kilo bell, you have attained the Simple goal and may begin to introduce the next heavier bell in a controlled way that doesn't send you spiralling way outside the time standards.
This mix-up casts confusion over whether you're over training or just using a bell you're not ready for.