She’s just absolutely manic and all over the place. If she’s got so many genuine work emails to deal with then why not spend an hour on a Sunday evening going through them quickly - read them, if it’s something easy and quick to deal with then do it there and then. If it’s something more in depth then leave it for now and keep going so that you get all the easy quick jobs done and then have an idea of what you’ve got left to do and then make a plan to tackle the rest. It’s just basic time & work management that she really should be proficient in by now, she’s been doing this job for how long?Why not start one thing and finish it before starting something else!