Toseg: Absolutely yes, in your particular scenario.
Eversince introduction of TCAS ver 7.0 for RVSM implementation, a modified logic is embedded to reduce nuisance, high V/S level-off encounters.
If such is the case, the onset of RA being triggered for the
aircraft maintaining level flight is delayed by 10 seconds. This applies to "time to CPA(*)" algorithm.
Feel free to PM me for authoritative reference, though I only have one for 7,0 that has been superseeded since.
* = closest point of approach
Hi, peekay4 you are suprisingly off here, I am afraid. Comapred to your standards, that is 
. You cannot hit one aircraft into another without including the second one in the collision, right?[/I]