Ever here the saying
If you don't like how something is being done then do it yourself
Classic case, you have your camera set to wide, so the camera is choosing what it wants to focus on, sometimes it gets it right, sometimes it don't.
So two ways to do it yourself, actually three ways, one not so good though.
Easiest way, set to spot focus, set spot where you want to focus, press shutter button half way down and shoot, or recompose the shot then shoot.
Second way, set to local, then use the rear pad to set the focus point, compose and shoot.
Third way, not very good way, set to wide, aim and hope camera hits focus where you want, if not release shutter button and have it try it again and again and again and again.
I do not use wide mode, I usually have mine set on local and have the spot selected and move from there if need be. having it set to spot is easiest but doesn't give you much flexibility, local is best way to go just be aware of where it is selected, it's very easy to hit it off of it's mark.