Attacks Single Out A Target?

I don't know about the initial hit, but there's a tendency to keep hitting what you're hitting. Try spamming Vampire and you'll get what I mean. Scenario:
- 3 WR staying in front
- Uses max Vampire (which can hit 6 but only actually hits 3) and pushes 3 WRs farrrrr >>>>
- More WRs spawn in between char and the 3 being-vamped WRs
- Vamp spamming continues to attack and push back the 3 WRs, completely ignoring the newly spawned ones.

EDIT: If you, however, stop for a second and 'refresh' Vamp spamming, it now has new targets (which are 6 WRs, the 3 old, and the 3 new)