Is it common to do well with strengthen questions but struggle with weaken questions?? What misunderstanding could be the root of this issue?

Q1 confuses me. Should the word "none" in the rule cause me to treat the rule with Group 3? Why isn't it "/relocated panda -> poachers"?

How long does it typically take to complete a BR for timed PT? What is the estimated amount of times of doing this to get a 170+?