Multiple Selection Using Row Selector

Is there a way to avoid what is shown below:
When the shift key is used to select a range of dates across Jan into Feb the dataset out includes 3 days of Jan plus ALL 28 days of Feb rather than 3 days of Jan and 2 days of Feb.

You’re going to have to make use of the Ctrl+click selection method in this scenario. Just make the bulk of your selection with the shift+click method and then when you’re getting read to cross over into a new moth to only select a few days use Ctrl+click to select the remaining entries avoiding the root node.