Axillary node clearance often does occasion numbness - digging around for lymph nodes doesn’t do much for the nerve endings. I had significant numbness under my arm (whose armpit is this stuff!) but it has gradually improved over time. Luckily I don’t use hot wax as the numbness also involved a complete inability to tell hot and cold, so be wary about that. Can’t help with the arm movement apart from saying that restricted movement is also very common and it will improve. Keep up the exercises. I had a single mastectomy and my arm movement was really good from day one, luck or a good surgeon! Best wishes.