TWS not selecting multiple targets

[Ironious]

I've watched a few videos, read Chuck's Guide but cannot get additional air targets in a group auto selected (boxed instead of solid). Sometimes I can, most times not. From RWS I can go into STT by selecting an aircraft in a group. Then either short fwd or aft on AACQ. Doesn't matter which TWS mode. Only the primary is tracked. Sometimes I can manually select secondary and so on but sometimes not. Have cycled the auto (pb10) boxed and unboxed and once in a while it will track the other three aircraft in the group which I can then cycle through with the coolie. What am I doing wrong? 

[Ironious]

I did more testing and believe the problems I was having were due to the closeness of the planes in the enemy formations. If they are spread out more it works as advertised.

Edited April 5 by Ironious