Weaving SAORI style

A beginner's weaving experience with the SAORI weaving loom.

The First Questions

Since I am in a small town - Boquete, Panama - I don't have many resources for weaving information. I hope that the SAORI community will help me by answering questions that come up.

Here are my first questions:

1. Is it better to weave in the cut ends when you change color instead of leaving them hanging? I plan to make clothes so I can trim them later when I make seams. If I should weave them in, how long a tail do you recommend?

2. When I do the clasped weft technique, the selvedges draw in and get tight. Is this common or is there a way to correct my technique? See picture below:

Thanks for your help!