Queue App - Free agent and waiting calls

Asterisk 1.4
I have strategy= leastrecent and autofill = yes

I have 2 agents, one is answering a call and the other is free and have some calls waiting in the queue.
Only when the first agent hangup the second agent receive the first call in the queue.
It happends some times.

This behavior still happend in 1.4.1 version.

Thanks a lot.