Stability - where its at?

WOD 5/22: catalyst wod

• full squat snatch 95lbs x 1 rep x 4 sets
• snatch pull 185lbs x 3 reps x 3 sets
• snatch deadlift 195lbs x 3 reps x 3 sets
• front squat 205lbs x 3 reps x 5 sets
• plank x 4 sets (30s max)
  

WOD 5/24: catalyst wod

• overhead squat 135lbs x 1 rep x 1 set - ties pr!!!
• muscle snatch 125lbs x 1 rep x 1 set - ties pr!!!
• power snatch 115lbs x 2 reps x 2 sets
• plank x 4 sets (1m max)

can't believe i tied the pr's so easily. is it the planks?