In my experience,when having to set the nock high to get a good paper tear,that will indicate a light spine,when you have a good level nock travel BUT that is a funny game that will yield different results in different situations.The rest indicates a stiff spine issue,especially if the rest is pushed out past centershot just a bit.

So,it is either torque, spine,or a little of both but as long as it is consistant,not a major issue but might be fun to play with in the offseason to learn and tinker with.

Might take a look at my tuning thread at the top and try some of those just to see how they work out for you.