Slices create from guides doesn't match guides
Hello,
I am having problems using the Slices>Create from Guides which do not line up.
It's only 1px difference but this causes a big problem for my work as my images need to be the exact width as they are used to code up an email.
Here is the top right hand corner of the artboard with the guides: ( 1440px wide )

And here is the same view after using Slices>Create from Guides:

As you can see, it is not lined up with the guide on the right. When I export the image it ends up being 1439px wide.
So I end up having to open it in Photoshop and modify the canvas size to 1440px. Then save it again but this is time consuming and beats the purpose of the tool.
There are definitely no other hidden guides in my file.
I also made sure that the X and Y position of my artboard are rounded numbers and aligned to top left:

Many thanks in advance!
Isa
