Validation sequence for attributes in RTC web client form

I created a form that goes :
A
B
C
D
E
F

I've set preconditions so you can't set the form from "draft" to "new" without filling A, C, D, E, F
But when you don't fill them out, the first attribute it asks for is C. then F, Then D, Then E, Then A
so the attribute validation goes:
C, F, D E, A
I've checked that it's not in alphabetical order or by attribute creation date.

I don't understand why this is happening and would like it so the attribute validation would go from top to bottom:
A, C, D, E,F

Does anyone know why this is happening and how it can be changed?

Thanks