Sophia and Ellie nothing listed for the event, so I assumed the next event is Sophia and Sam? Then Ellie and Sophia
There's nothing listed in the "Notes", sure, but it's still an event. It depends entirely on what counts as "very small". With events being up to 600 renders, 140 renders might be considered that, but that was the entire size of the last Ellie event and a lot happened in those 140 renders.
Much more than what it looks like is happening in the 400 or so renders of this update so far.
EDIT:
With the second Ellie event not being a shower, I'm not really surprised, I would have expected the shower event if there was one to be the first of the day.
I suspect the very small Ellie event may be like the scene with Sophia and Ellie drinking sodas in the kitchen on PD11, which from memory was really just Ellie making sure that the boys weren't going to be around so Ellie could get up to shenanigans.
Might also include a debrief if Sam gave Ellie a lift home after his concert. From the Ellie route perspective, there's still some setup that needs to happen for the Sam branch to start on PD16.