Thanks for your post. I see that the Power Control registers values are very different to the ILI9325.
The Entry Mode (0x03) is very unusual.
I would appreciate it if you could run the "graphictest_kbv" sketch and answer the 3 questions from message #3.
I manipulate the SS, GS, ORG bits to achieve Rotation in a consistent way. With the I/D bits set at 11 (i.e. increment horizontal, increment vertical).
It looks as if your JPEG is displaying Portrait mode with GS in the wrong direction.
Note that the graphictest_kbv sketch states each direction and mode.
This should make it easy to say "PORTRAIT is reverse-vertical" to describe your photo.
From your earlier post, you said "text was reverse-horizontal"
What happens if you simply force tft.begin(0x9320) in the graphictest_kbv sketch?
I am sure that we can get your Shield displaying 100%.
Do not worry about English translation. But it would help if you run graphictest_kbv.
David.