Automatic planning in ProjeQtOr

hi,
There is no restriction at all !
Projeqtor plans AA because it is the first activity on your planning work breakdown structure. Moreover you use probably the planification mode ASAP and not a special one as possible. Thirdly, no other constraint exist. For all those reasons, AA is planned firstly, the tool optimizes the planification depending on your choices even if a a resource could not be planned one or severals days ( especially due to dependencies in your case , or milestones sometimes, workload given, planification mode and so on )
The resource could not be planned before cause she is already planned. ( your single pic attached can not show this - Please indicate the resource's name  on each bar and the workload assigned for each ) Sure the tool does not make any mistake. 
Yes Projeqtor following your organisation and constrainst can expose who is planned or not . That is why is a real good tool....
 

Play with priorities on projets, or on activities, or change your wbs, or create a dependency, or workload differently each resource, why not with a special mode of planification ( i am not so sure in your case) , you will reach your expected solution
your job is going on ...   Projeqtor offers flexibilty on project steering.

Hi,
Thank You.

An efficient project management can never be entirely automatically driven by software. The choice to use one planning option rather than another depends only on the project manager who knows his environment as well as possible. (6M Ishikawa)
I am very interested in knowing how MSP is efficent ??!! More and more firms use Projeqtor because they do not want any more to steer their projects only with pretty drawings which will have little chance to being kept.
Projeqtor is able to manage from the simplest to the most complicated project.
See you.