It's not a mistake. Stephen King did this intentionally.

There are lots of references, icluding one in your question, in the series which tell us that places are not stable, world is moving on (literaly); because the Tower is weakening.

I have to re-read the books to find these references, but for now I've found this from Stephen King's offical website:

About the Dark Tower:

...the Dark Tower is the nexus point of the time-space continuum. It is the heart of all worlds, but it is also under threat.

Because of that threat:

In Roland’s where and when, the world has already begun to move on. Time and direction are in drift, and the fabric of reality is fraying. However, things are about to get much worse. The six invisible magnetic Beams, which maintain the alignment of time, space, size, and dimension, are weakening. Because of this, the Tower itself is foundering.

Directions are not reliable anymore. As the fabric of reality is fraying, places are not always where they are supposed to be. Things happen irrationally, unfitting the very laws of the nature.

It's not a mistake. Stephen King did this intentionally.

There are lots of references, including one in your question, in the series which tell us that places are not stable, world is moving on (literaly); because the Tower is weakening.

I have to re-read the books to find these references, but for now I've found this from Stephen King's offical website:

About the Dark Tower:

...the Dark Tower is the nexus point of the time-space continuum. It is the heart of all worlds, but it is also under threat.

Because of that threat:

In Roland’s where and when, the world has already begun to move on. Time and direction are in drift, and the fabric of reality is fraying. However, things are about to get much worse. The six invisible magnetic Beams, which maintain the alignment of time, space, size, and dimension, are weakening. Because of this, the Tower itself is foundering.

Directions are not reliable anymore. As the fabric of reality is fraying, places are not always where they are supposed to be. Things happen irrationally, unfitting the very laws of the nature.

It's not a mistake. Stephen King did this intentionally.

There are lots of references in the series which tell us that places are not stable, world is moving on (literaly); because the Tower is weakening.

I have to re-read the books to find these references, but for now I've found this from Stephen King's offical website:

In Roland’s where and when, the world has already begun to move on. Time and direction are in drift, and the fabric of reality is fraying.

It's not a mistake. Stephen King did this intentionally.

There are lots of references, icluding one in your question, in the series which tell us that places are not stable, world is moving on (literaly); because the Tower is weakening.

I have to re-read the books to find these references, but for now I've found this from Stephen King's offical website:

About the Dark Tower:

...the Dark Tower is the nexus point of the time-space continuum. It is the heart of all worlds, but it is also under threat.

Because of that threat:

In Roland’s where and when, the world has already begun to move on. Time and direction are in drift, and the fabric of reality is fraying. However, things are about to get much worse. The six invisible magnetic Beams, which maintain the alignment of time, space, size, and dimension, are weakening. Because of this, the Tower itself is foundering.

Directions are not reliable anymore. As the fabric of reality is fraying, places are not always where they are supposed to be. Things happen irrationally, unfitting the very laws of the nature.