Perhaps I’m missing something but why would the folder ‘date’ change…is this usual?
Yes. Usually when you change a file within a folder the “Date Modified” date for the folder also updates to reflect the new date. It’s pretty useful because then you can jump those most recently updated folders to the top of the listing and not have to scroll through the entire thing.
I know that Finder is a pretty behind the times and I’m not sure if that is “proper” behavior, but I’m so used to that style of workflow that it’s thrown me off. Other programs such as Coda set the folder dates as well, so I know it’s just a SublimeText issue. A quick googleing shows that a few other people have asked the same question but no resolutions seem to have come from it.