1. for email sender, you will need to use some kind of SMTP plugin to make email sender as you want. it seems we unable to mask email sender to another from code.
2. may i know which heading is it? if you mean title, you will need to do some change on your PO / MO file. i mean translation file. you can change title of your email right there.
3. we going to release new update to fix this issues. it seems we have problem with it.