When calling getAllShippingMethods(), then saveShippingMethod() and finally another getAllShippingMethods(), it does not show the saved one.
Two obvious choices here:
Thanks for reporting. Marked as a bug, and will fix shortly.
Fixed in b07702ed88daadaa67716ef197e4af7c5e7f64ed
Thanks this has been fixed for the next release.
Most helpful comment
Thanks this has been fixed for the next release.