Inside tire wear on the front.

The last thing that you set on an alignment is toe.
First inspect the entire front suspension for worn, damage parts. Remeber that you will get dimension stacking on the steering components. That means that a little movement of a tie rod can be added to the inner and outers. 1/8" each is 1/2" total if they were worn the same amount. Idler arm play can have a significant effect on toe wear.
jack the front up with a floor jack centered on the K-member. Grab one tire and move it back and forth and you will see the play in the steering components. There will always be a little play ,so excessive play is what you are looking for. on the passenger side do the same. Also grab the idler arm where it connects to the centerlink and check for up and down movement.
Other wise if you just set the toe without a spreader bar or someone on each side pulling the front of the tires outwards, the toe may measure perfectly but as soon as you are driving forward the tires will try to toe out by what ever amount of slop you have in the front steering parts.
Take it to an alignment shop with the proper tools. It is cheaper than tires and you are not guessing.

Your Vehicle's Steering Linkage · BlueStar Inspections