80d focus points

[chief54]

When shooting BIF sometimes bird is in focus other times not. When using single point or zone 9 focus points I will check where focus points locked in they show locked on bird/birds and shot is not in focus, or when shows focus points locked on background and not on bird/birds they are in focus as in image below any ideas why?

[ebiggs1]

"using center 9 focus points with two locked on birds right wing and no editing,"

This is motion blur.