Function QUEUE_MEMBER

Hello,

newbie has a question concerning the function QUEUE_MEMBER. Asterisk version is Asterisk 1.6.2.15.
Defined a queue called 104 and added two static agents:

pbx*CLI> queue show 104 104 has 0 calls (max 255) in 'ringall' strategy (0s holdtime, 0s talktime), W:0, C:0, A:0, SL:0.0% within 0s Members: SIP/30 with penalty 5 (realtime) (Unavailable) has taken no calls yet SIP/11 with penalty 5 (realtime) (Not in use) has taken no calls yet No Callers

A

in an .ael-script results in

in the CLI. This seem to be correct because agent SIP/13 is unavailable. But a

in the same ael-script results in:

The number assigned to memberCountCount seem to be arbitrary but constantly increasing in time. I would have assumed memberCountCount to be set to 2.
Am I wrong and if why?

Thanks in advance

ChriMu