The planner runs one program at a time. That's on purpose, so your week stays structured.
Want more? Add extra sessions on your open days instead. Same result as two programs, without the schedules fighting each other.
On Home, scroll to More and tap Workout Planner.
Tap the pencil icon, then the + on any day.
Pick a workout from Classes or Gymstyle and tap Schedule.
Cardio, abs, a stretch session, another strength day, whatever fits.
Protect your recovery. If your performance or your sleep starts dropping, that's the signal to pull back.