Moving plants in spike leads to this most of the time. If you want well-arranged flowers on an upright spike, it is best to begin the process of staking them once the spike begins elongating, and not move them with respect to the light after beginning the process.
You can also choose to have well-spaced flowers on a horizontal spike, the plant's normal growth pattern. But again you must not move them as the spike develops.
__________________ May the bridges I've burned light my way.