Hello Baloo

1. Currently the notification has only one link which is used for the whole card. It's a link to the action to which the notification intend. Profile names included in the Notification are simply separated out with bold font. 

2. Author = 0 from `bx_persons_data` table shouldn't affect the functionality. Did you apply all related fixes from repository? Did you disable/enable Notifications app before testing? If so, I can try to investigate the issue directly on your site.

3. What do you mean with Master verstion and Test site? If Master version is auto installed UNA script from https://ci.una.io/test/ and Test site is UNA script from https://demozzz.com/una/ then NO. UNA on https://ci.una.io/test/ is reinstalled automatically after each commit in GIT repository. So, it has the latest DEV version of the script. UNA on Demozzz is manually reinstalled from time to time for test purposes. Some fixes can be moved in it manually between reinstallations. 

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Best Regards
Anton