You really did want a CCS guru ... you 
didn't even mention the episode number.  But 
Yukito in the dragonfly yukata and holding the 
water balloon yo-yo can mean only One Scene to 
The Initiated.

Well ... I ran to my tapes and checked, and, 
sadly, they're not matching layers.  
During the entire shot when Yukito is holding up 
the yo-yo, Sakura has her back to the audience.  
Then we see her holding up the yo-yo and thanking 
Yuki (and Tomoyo videotaping her), and then we 
get the scene with the bottom cel in it.  

If you look closely, you see she's holding the yo-
yo in the second cel (see her left hand?) 
although it's hidden by her fan.

The problem with trying to match it with the one 
you have, even if you wanted to, is this:  the 
shot comes from a moment in which Touya is acting 
strangely, and Sakura is turning back and forth 
between him and Yuki, whom we now see from a 
different perspective (i.e., through Touya's 
eyes).  So the two aren't going to go together 
because your Yuki is seen from BELOW (Sakura's 
point of view) and the Sakura is seen from ABOVE 
(Touya's point of view).

Sorry.