Photoshop crop grid.

Is anyone else having issues with the grid overlay when you're trying to crop an image?
Whenever I try, the grid overlay appears but the lines that form the grid are many more in number than than there ought to be and obviously, they're much closer together. So close, in fact, that the overlay's rendered useless.
If I select another overlay, rule of thirds, for example, that displays correctly unless I click the cursor anywhere outside of the image which causes the to-tight-grid to replace it until I release the mouse, when the other, chosen one reappears.
This is what I'm getting:

As opposed to this, which is what should be happening:

The first image is one that I took at Duxford last September and the second is one that I downloaded ages ago from somewhere online.
For some reason, ALL of my own images; I've tried ones that I took years ago, are suffering the too-tight-grid scenario, whereas if I apply the same tool to images, selected and downloaded at random, all is well.
I'm using Photoshop CC in its latest incarnation.
Al updates in place.
Any ideas . . . ?
Whenever I try, the grid overlay appears but the lines that form the grid are many more in number than than there ought to be and obviously, they're much closer together. So close, in fact, that the overlay's rendered useless.
If I select another overlay, rule of thirds, for example, that displays correctly unless I click the cursor anywhere outside of the image which causes the to-tight-grid to replace it until I release the mouse, when the other, chosen one reappears.
This is what I'm getting:

As opposed to this, which is what should be happening:

The first image is one that I took at Duxford last September and the second is one that I downloaded ages ago from somewhere online.
For some reason, ALL of my own images; I've tried ones that I took years ago, are suffering the too-tight-grid scenario, whereas if I apply the same tool to images, selected and downloaded at random, all is well.
I'm using Photoshop CC in its latest incarnation.
Al updates in place.
Any ideas . . . ?

Quote:Apologies if you already know.... Edit > Preferences > Guides, Grid, & Slices.
Thanks Phil; that was the first thing I tried but whatever permutations I use, it makes no difference.
Quote:Have you clicked on 'Show' by accident in 'View' as this switches on and off certain grids.
Tried that too Angie.
If I tell it to show "grid," it permanently displays the "perspective crop" grid and the correct "crop" grid overlay at the same time.
It even does it on years old, straight from a 7mp. bridge camera, Jpegs.
It doesn't matter which format I save the files in; Jpeg., Tiff., png., all end up with the same result.
I even tried reverting to an older version of Photoshop. It still happens.
It's as if there's something common to all of my own files that's causing this whereas random, downloaded stuff doesn't have it.

If it works OK with the last version Jester it might be worth letting Adobe know as there may be a bug in the latest one.
Added
You may be pleased (or more frustrated) to know that you are not the only one. Looking at the |Adobe Community on Adobe Cloud section there are at least 2 other people who are experiencing exactly what you are seeing
Added
You may be pleased (or more frustrated) to know that you are not the only one. Looking at the |Adobe Community on Adobe Cloud section there are at least 2 other people who are experiencing exactly what you are seeing

I don't know if this is what you are wanting, but when you have the grid on, go to Edit > Preferences > Guides grid & slices > and you can choose the distance between the grid lines and the number of pixels or mm or % that you want. In the Sub-divisions box, 1 is the baseline.
Think that's it, but old tech CS is good for me.
Think that's it, but old tech CS is good for me.