Relocation of house with shirogane walls didn't convert house to hingan style

[EpicCelestin]

I relocated from the Goblet to Shirogane today and my house had the SHirogane castle walls exterior fixture on. I am unable to remove my Shirogane castle walls now because I do not have the appropriate items to place on my house. All of my interior is Oasis style and I have all of the pieces to the oasis style house in my inventory. I am also afraid to demolish the house because of fear of losing the Shirogane castle walls which costed me 3+million gil. Shouldn't my house have changed to Oasis style? Or at least the oasis style items I have should be able to be converted to Hingan style ones.

Date & Time: 3/3/2018
Frequency: On relocation with Shirogane Walls applied to the house
World name: Saragatanas
Character name: Celestin Avastara
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Housing: Goblet ward 16 lot 45 to Shirogane ward 5 lot 50
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[Masekase_Hurricane]

As far as I know u either need to go into the housing menu and select Estate Hall purchase construction permit, craft the individual pieces or purchase them from the market board. You don't need to demolish the house.