Outter stroke is overlapping other characters
Here's an example:
And here's an image I designed yesterday without that problem:
I didn't use any special process on the second image to keep the character strokes from overlapping things.
If your type is outlined, you either need to apply the stroke to the group (you need to do this through the Appearance panel, otherwise the stroke is applied to each path individually).
Or you can create a compound path by selecting all of your outlined text and hitting
cmd/Ctrl + 8 (or Object â†’ Compound Path â†’ Make).