Don't you know that's intentional! How else do you think they kept the kingdom hidden for so long. It moves. They have their own version of the reality stone and periodically they move Wakanda, keeping everyone guessing where it really is. GRIN
That would an interesting concept to pull off in a movie.
Yall remember this exchange from my fanfic years ago? Chapter 2. D'Ciggs [ T'Challa's brother, a family member who was listed back in the '90's but is gone now so I returned him ] and Uncle S'yan the Swift are talking.
And then D'Ciggs broke the silence.
"Storm does not know of the Protocols activated by Doom's attack and The Phoenix's approach, does she?"
"No, nephew, she doesn't."
"So she doesn't know that you were never killed, because flesh transmuted highly enhanced Life Decoy Models replaced you and Mother long before Doom had even the most remote chance of endangering you, me or any of The Royal Family and our key functionaries at every level of government."
"She has no idea, nephew."
"She doesn't know, then, that as part of these protocols--and due to the timely vision supplied by both our great Panther God and the vast preparations done by all previous Panthers, including yourself, my father and my brother--Wakanda's civilization and all of her people would wink into our special Interdimensional Pocket, proof against detection by any means, proof against the passage of Time, the entry of any being, etc. due to our nationwide Quantum Substratum ChronoSpatial Psi Mystic Ka Manipulators? Does she at least know of the Mobility Units and Nationwide Defense Shields...
...no, she doesn't, does she, Uncle? T'Challa didn't inform her because he knew that such knowledge would impact her decision-making once The Phoenix began to make its ineluctable return. And that would remove her from being placed where TChalla wanted her to be placed, should he ever need to invoke The Roguestorm Option."
"You are starting to see the complexities now, my nephew..."
In my fanfic, T'Challa's innovations with Reality Particles [ especially useful against beings like Psycho Man, Nightmare, etc ] and Shadow Physics propelled Wakanda further and faster along almost all lines of tech, magic and ka than all previous Panthers...and this is without his KOTD enhancements.
That's a pretty good explanation for the migration of Wakanda, isn't it? Plus it's a really good way to frustrate the crap out of enemies,and underscore the myth rather than the reality of Wakanda. Make enemies not even know if Wakanda is real, and eventually forget about it...thus the Kingdom of Wakanda can remain hidden, as Stan Lee and Don initially intended.