Thank you men for all your help. I meet with a sales associate at one of my Schluter suppliers here in Vancouver and inquired about this project. I was told that the hotel purchased these Kerdi Drains from Schluter and had a third party company bend them. They where selling a few remainders and stopped because of issues waterproofing them.
I showed the pictures of the Orange Mold and the sales girl was stumped. I asked about the plastic in the drain and she like me had never seen this before. So much points to installation error but with all that said the fact that the Orange Stain is no pronuced on the grout lines leads me to believe it is a surface mold like suggest above feeding on the shampoo and soap scum.
I shared this information with my client and as it turns out it has not been her living there all this time but the suite was rented out to a bachelor. The plot thickens.
No to find the best cleaner and hope we can treat the problem and with some regular cleaning stop the process all together.
If it can't be cleaned and if we go with a full tear out perhaps then I will find out what purpose (if any) the plastic serves.
I purchased a new Kerdi Line drain yesterday an look forward to a closer inspection. I'll share my findings and here.
Looks like a straight forward install with a simple 2" no-hub fitting. I looked at the flat panels that can be purchased to create the one way slope but can get my head around how they drain the shower pan in the extreme right and left of the shower. Look at this picture;
I would think to achieve a well drain shower pan you would need to pitch the those small tiles a hair up and create just a hair of lippage. I think when I go to install one I will make the drain go fully left to right or instal the field tile on the shower floor the same measurement as the drain and create a border. As shown on the packaging and this sales brochure I think these four points will be problematic for drainage and soap residue.
Stand by for pictures. The Kerdi is pre attached to the drain body which is nice. Just like the Proline. The seeming appears to be factory made and not pieced together which is more comforting than I first suspected.
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Always get construction advice double checked by your local city hall. Flood Test Every Shower - Every Time.