Aliases being stripped when saving nodes

On some nodes, I am required to check that box every time I edit the node and try to save, or I get the following error: "The path alias higher-education-personal is already in use. You should provide a domain-specific alias," which is odd, because I never specified "higher-education-personal" as its alias, and it's current automatic alias is different (higher-education-personal-relationships).

This only seems to be happening when there are multiple nodes that start with the same word (see above). Is this module stripping the alias down to a certain number of words and then getting upset because the alias is the same?

Is this even a problem with Domain Alias, or is this a problem with URL aliases in general? Either way, the error is being provided by Domain Alias, so I'm leaning in that direction.