Sorry, I have a lot of things to do
I know contacts sync is buggy. I'm trying to fix it
Adding new functionallity like push names brings new bugs to wazapp. I'm working hard for fixing this.
Also, I need to change the database file to make some things to work better. It's a lot, please be patient.

And remember it's a beta version. Of course it's not 100% stable.

BTW: I've added the account plugin translation project
You can start contributing here:
https://www.transifex.com/projects/p/wazapp-account/