Big question of af center point, and tracking subjects ON! Bug or is really how works???

Hello people, well I already have the eos r7 and it is fantastic, I am trying things, watching tutorials for BBF etc etc... but I have seen several videos that there is a problem with the autofocus system when you choose a central focus point, for example, you enable servo and enable subject tracking...The autofocus system configured like this DOES NOT respect the central point or flexible zone for example or a larger square...the focus points in blue appear outside the focus box... (in this case the central point) and it does what it wants... it detects other things it focuses on other things that are around... but it ignores that I only want it to focus on the central point... is this a bug? Or is it really like that?...If I deactivate the tracking then if it respects the central focus point, I can move it wherever I want and it will focus only on that point and nothing else! ....In this video he explains this problem... has anyone else seen it?


So the question is that it is better to configure for birds... that you want to catch the eye but with only a central focus point and that the focus does not go to crazy or go crazy? I think it only happens in Servo...in one shoot it respects the central point or the one I configure...but in servo and tracking activated any point or focus area that I limit the camera does not respect that limit and focuses many times. sometimes outside the limits of the focus box and that is wrong... Any clarification or suggestion for R7 owners? Any custom buttons for focus and tracking or several that you have that work well for you? Thank you all very much.