Confusion about "Guides"

[Paul Bruneau]

Hi Everybody,

I've had to include a screenshot of the issue that's becoming an unnecessary irritant.

You can see that the left-most vertical guide (Which I'll GUESS? is the "X" axis?) is lined up with the "0" on the top ruler.
Then, on the top-most horizontal guide (Again, I GUESS? is the "Y" axis?) is lined up with the "10" on the side ruler.



For my own piece of mind, I want to adjust that "10" to a "0". How do I manage that? and Should I care?