Real work allocation issue TASKS

HI,

I have about 15 tasks asign to specific users. Let's say, user, Bob and Bobby.

If I open real time allocation for those 2 users, no probem, i see all the 15 tasks.

But, in real time allocation, if a select another user, let's say, Rose, all the 15 tasks get's assign to Rose. even if in each tasks, the assignment was Bob and Bobby,. Now if look at all the 15 tasks, Rose is now assign to those tasks

And so on, if in real time allocation, if a select anothers user, this user get's assigned to all the 15 tasks.

I have about an hundred tasks, but only those 15 are assigned automaticly.

Anyone can help with this issue.

Regards
Karl