>>[...] grid's builder is not the best tool to design a grid, i.e. you may find that building grid from scratch will give more reliable way.
>
>Glad I'm not the only one who thinks that. Used Builder about twice before I realized I got a better grid making it manually from scratch.

Yes, this 'feature' is originated from the fact that grids have unfortunate habit to re-built themselves from scratch when recordsource is overrided, i.e. it makes sometimes grid's builder settings useless.