Question: Difference Between Flip Tapestry and Double Tapestry?

Hi,
Should ENTRY #150798 be merged into ENTRY #131162? Is there supposed to be a distinct difference?

It appears either items are misclassified, or the names/aliases need to be corrected for both ENTRY #150798 and ENTRY #131162. This also affects related ENTRY #118093.

From what I can see, many items in both entries clearly appear to be the two-layered tapestry type that needs the first layer flipped vertically over the top bar to properly display the second layer underneath, like calendars. Meanwhile, reversible (or double-sided) tapestries should probably have its own entry as they need to be rotated horizontally to view the backside image.

***Some NSFW links below

Two-layered examples:
All of ENTRY #118093 appear to illustrate vertical flipping of the first layar, especially when viewed on GOT's website.
GOT W Tapestry - ITEM #582705 [comic.gotbb.jp/...]
GOT W Tapestry - ITEM #1729879 [comic.gotbb.jp/...]
W Tapestry - ITEM #1426001 [www.1999.co.jp/...]
Mekureru Tapestry - ITEM #584301 (PICTURE #3154395 and PICTURE #3154396) [www.amiami.jp/t...] [b2b.mile-stone....]
Mekutte Deresareru Tapestry - ITEM #737085 [store.kadokawa....]

Reversible/double-sided examples:
Ryoumen Tapestry - ITEM #787000 [c-agent.shop-pr...]
Ryoumen Tapestry - ITEM #826037 [www.melonbooks....] [www.melonbooks....]
Ryoumen Tapestry - ITEM #826087 [www.melonbooks....] [www.melonbooks....]
ITEM #1056085 [description on www.melonbooks....]

Possible context reading for double-sided tapestries, with a note that some need to be printed on 2 sheets: www.ogata-print...

Am I misunderstanding or overthinking things? I know I may have misclassified at least a few items.