Fan lid direction and covers

Hello!

I am new to RV thing and I noticed that my 2008 Majestic 23A has strange vent configuration. Two vents that are in main space are passive and they open so that air when traveling is pushing lid down.
The Fan-tastic fan lid in washroom is in reverse direction. It acts as a scoop if one forgets to close it before moving.


--------> Travel direction / (Fan-tastic vent) \\ (other two vents)

I figured out that is just something that I must remember to close but now that I am looking for vent covers I am realizing that they will not work with that orientation.

So questions, is orientation for the fan lids matter of choice or was the person that installed my bathroom fan impaired?

I think I will have to rotate Fan-tastic fan if I have hope to find the lid that will allow it to open once installed.

What is best fan cover for Fan-tastic, I see some bad UV resistance reviews for the original covers.

Thanks!