Can you get a good group tune /broadhead tune and still have a little porpoising out to 30 yrds ?

I haven't shot in 3-4 weeks and was shooting sunday and could see what looked like some of my arrows kicking right then straighting up on the shot ! I was shooting at 30 yrds and my groups were tight !

Think I was just rusty with my release or torquing ? Or should I re-evaluate my tune ?