[How to change new file placement limit on drive]

I have 5 drives in my pool, 1 with 5.46 TB, 3 2 TB drives and 1 1 TB Drive.  One of my 2 TB drives has 1.82TB available and no files added to it.   The other 3 small drives are almost full and the large one is about half full.   None of the others have an arrow showing a limit to new files.  The balancing for all the folders is identical to the image below.  The drive usage limiter is shown as well.   I have removed that drive and readded but still get the same.    

[Mis-assigned Drive]

So I had to move my Drivepool from my old Windows 10 dual core I5 computer to a new Windows 10 10core I5 computer.  In the process, one of my 4 2TB drives got put into a separate pool and now I can't get it back to the original pool.    Even with duplication turned on, I have just noticed that I am missing some files.    My Plex which also isn't working on the new machine due to a transcoding error, shows that I am missing several episodes of 1 season.   That drive still shows about 1.8TBs of data in the pool on that drive.   How can I get it back into the correct drivepool as it now does not show as an option to add to the pool.