no spooky, you think of the wrong thing. i dont talk of using an abilities so after it you need to right click again. i talk of the following situation:
1. right click on enemy dg... the generals hits him ones (if at all) and then moves to another creep around.
2. or you already right clicked on an enemy dg, and this one starts to retreat. you automatically start to follow him but on the way your general stops and switches to attack a nearby tower or creep or what ever.
this happens all the time.
addiionally it often even does not responds to your right-click order.
but to continue with the many many generals bugs:
idol priests getting stucked in citadell, so you need to port to get them back?
there are some more bugs of this kind. and they all are known since beta and surly easy to fix!