Task associations with Gantt (Finish-to-Start and others)

Hi, 

I didn´t find in the documentation something explaning more about task associations. I have noticed that we have "gantt" options and would like to know if they are supposed to work as in MS Project predecessor field for example, where finish date of one task impacts the start of the other automatically. I could not exercise this behavior in the tool.

Another point is that I have associated one task as "Finish-to-Start" with the other, but when I check the second it is also listed as "Finish-to-Start" with the first, so it is not clear the relationship of each one should finish for the other to start.

Thanks,