Uh, but if you do notice where 9481L has been spotted most of
the time since the start of this year, that's like since 8 months
ago, that particular bus more often than not does Sv 23 on
weekdays.
And mostly when that happens, the Sv 10e VO3xs are usually still
on their regular slots for Sv 10e, regardless whether they are perm
10e/23 or 10e/10. I'm not discounting the possibility of what you
say, but it can't be that happening everytime for the past 8 months
that if one of the perm 10e VOs disappear, they pull only 9481L out
to cover that slot? 
I think Sv 23 might have gotten a fleet add..but then again, I'm
not sure if Sv 10 had a fleet reduction in the first place? because
if there was one for Sv 10, that would have taken place early this
year..and no one mentioned it till now~ 
But hey, actually if you have noticed, someone in sgwiki edited
sv23 to have a fleet reduction back dates to April this year. I
believe that what you mean that 9481L could be for 23 is possibly
true instead. No fleet reduction as for yet for 23, 9481L replaces
9624S that went to sv90 in BR?
Sv10 may have gotten 9579P been seeing it on and off. But I do
know that there is one other batch 2 vso running on 10
everyday.
