Two things come to mind: Either your target isn't squared up to you as you are shooting.... or especially if you are shooting a bag target.... your target medium isn't consistant.
Neither of which, in my opinion, are anything to be concerned about.
Your arrows will have totally stabilized by the time they are 20 feet off the bow.... so there again... nothing to be worried about.
FWIW though... I do think you are underspined.... or right there near it. But again.... it would effect your point of impact... and of course your flight... but with fletched arrows... they will stabilize before they make it to ten yards.