datagrid sorting issue

[DBC User]

I have a data grid. In it, it has 4 columns. I allow the user to sort
the gird by column. I have around 1000 rows in my data grid. There is
one column called status. The user sorts on status and it shows all the
rows correctly. Now the user presses SHIFT + uparrow and select 3 rows.
Now user select right mouse to select a context menu and through
context menu, the user start a back ground process for these selected 3
rows. When the process starts, it changes the status of all 3 rows.

Here is my QUESTION
1. When the process changes the status, all but the first rows stays
and all the others gets sorted to its proper place since the status
changed. The first row doesn't get sorted but the status does get
changed on that row as well. Why it didn't get sorted?
2. The user select 3 rows using shift, after the status changed, the
selection now move the next two rows (since the actual last 2 rows are
moved to proper places, it automatically select the next 2 rows and
that is INCORRECT). That makes user confused on which row they actually
selected. How can I EITHER force the data grid to keep the row
selection even if the rows get moved?
OR how can force the sorting to NOT TO CHANGE these 3 rows that are
being worked on?

I spend couple of days to track down the issue. Please let me know if
there is a way to solve this situation.

Thanks a lot.