Bouncing Ball Problem

[NK0]

I find a problem of bouncing ball movement which is really annoying. I make two balls, and I don't want any collision between them unless they are both bouncing (or under other conditions, see my attached mfa).
But the fact is, when the stopped ball is near the bat or window's edges(the blue ball bounces at the window's edges and the bat), the route of the bouncing ball will still be affected by the stopped ball---even one of them are not bouncing!What is happening?
Thanks for any suggestion.

[Yikes]

That is kind of strange. I tried changing it to flags instead of values, tried to compare the two values together, tried using OR conditions, even tried setting two different counters and check for the counter value instead of the values of the objects, and nothing would work. Seems it is a bug of some sort =/