Column in _tbl forms change position

Hello, I have a problem. In the tbl i put the fields in the cascade mode, like in the example of the framework, and when i acces the tbl using the tree of the framework, the columns change the position, in this chase the first and the second change her positions. Anyone knows this succes? any suggestion? a lot of thanks.

This is the correct order

And this is is the order changed

You can see the field Modelo y Versión changed in order, and don’t know the reason, any help?

Maybe the position is saved by the framework. What happens if you use the button refresh table headers?

Now works fine, but don’t know really why, because i don’t change anything, only comented/discomeneted a piece of code.