Jcink can be finnicky at best of times and it really is with the tagging feature. Whenever you're posting to someone, be sure to refresh the tags every time so that they get alerted to a new post.
If you're new to tagging, please give it a go! It's a really useful feature that alerts members to posts aimed at them, be it in a thread or in their plotter! To tag someone is ridiculously simple;
For example, if I were to tag Rabbit's admin account, I would put WHITE RABBIT in the 's
If I were posting to connor, or in connor's plotter, I'd put connor temple in the 's
Ask if you need help!