Created new Storage Pool - Conflicting list of disks included

I decided to go from a parity storage pool due to poor performance to a mirror storage pool.

Originally I removed 1 of the 4 3TB drives from the pool to use as temporary storage for the data as I destroyed the old pool and create the new mirror pool.
I created a new pool via powershell and have a concern before I continue.

PowerShell shows the Physical Disks in the New Pool as PhysicalDisk # 1 & 2.However, the GUI shows PhysicalDisk on the New Pool as # 2 & 4.
I'm weary on moving on with creating a new virtual disk and volume as I do not want to wipe the data on PhysicalDisk 4.

Which report do I believe on what disks are contained in the New Pool?