See attached files. Sorry in advance if my lingo is off. I'm still on the steep part of the learning curve!
In the .idraw file, see how there's a path running down the middle of each line, like a backbone, so you can easily change the shape and pressure curve of the strokes? In the SVG, that path backbone is gone. Each stroke appears to have been outlined with a path instead. If you go into Outline Mode on both, you can see that this is in fact what has happened. I don't want that. I need the backbone.
To give you a bigger picture of my goals, the following is what I'm trying to accomplish with this. (I do have more questions about the below, but the above is the first step - I work primarily on my iPad, and since Affinity Designer is not on the iPad yet, importing is my only shot at accessing Designer's features.)
I want to:
1) Take multiple different paths, each with their own unique pressure curves.
2) Assemble them into the outline of a shape, joining them together (maybe at their endpoints, maybe not) in a way that doesn't screw up each individual path's pressure curve.
3) Fill the resulting shape with color.
4) Be able to edit the individual paths and each one's pressure curve later.
Bell - just lines.idraw
Bell - just lines.svg