The tests suck. There are several reasons why this is truth.
The variant stacks (so/sx/sp) are chosen by the tests based on global indicators that are just poor for determining your stacking order.
If you are stressing or feel threatened in general, or are just plain unhealthy you can very easily test as your "stress point" type.
Same can be true if you're very healthy too... you could test as your "growth point" type.
Lots of types can be tough and aggressive... the tests tell many of them they are 8s. Same as with variant stacks this is due to poor global indicators.
I STRONGLY recommend you read through the profiles instead of taking the tests. See what makes sense to you. It is up to you, but I'd guess you have about a 50% or even greater chance of being mistyped if you rely on the tests... so there's a high chance you'll just end up wasting your time.