Stroke Overlapping

For my part you are welcome, scatterbrain. Some (variable or just sloppily finished) fonts are like that.

In many cases there are different ways to do things, in some cases such as this they lead to different appearances, and then a design choice is required.

You have the stroke on top of the fill of the letters, and half the stroke covers the outermost part of the fill whereas the other half is outside, which means that the centre of the stroke follows the original letter shape; this corresponds to draw along the outer bounds with a pen.

The tutorial has the stroke behind, so only the outer half is visible outside the original letter shape (you can obtain the same width by doubling the stroke weight), which means that the visible stroke is outside the original letter shape; this corresponds to draw outside the outer bounds with a pen.