Meshing problem on aerodynamic simulation incorrect results

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There are artifacts on the tail as well as select other places on this aircraft that impact the solution. I believe the root cause of this maybe the fact that half the plane was designed than mirrored. I would like to know what I can do to solve this, and have attached the design study.
https://drive.google.com/open?id=1Nj-JU0isNEy9UzioZ4Wrzj6pYkj-VqLY
(attachment would not work)
I would also like some suggestions as every time I run the simulation a high velocity zone shows up in a different place. This is no reason that I can think of, and is many magnitudes greater than what should be possible.
This is also my first time using motion, so that maybe another problem.
CFD 2018
Windows 10
CPU Intel(R) Core(TM) i7-7820X CPU @ 3.60GHz
RAM 16 GB
GPU
AMD Radeon (TM) R9 380 Series
Driver version: 22.19.677.257
Driver date: 09/21/2017
DirectX version: 12 (FL 12.0)
Utilization 4%
Dedicated GPU memory 1.5/4.0 GB
Shared GPU memory 0.1/7.9 GB
GPU Memory 1.6/11.9 GB
Proven Impact
Strange Squiggles
I also dont know what this absurd high velocity zone is
Thank you for your time.