Stan,
I am not sure what you are saying but if you mean that a compound filter could be used as a single filter or compound filter then yes that is perfect, I wouldn't want other members losing a feature for something I have asked for.
Often I will play a filter that is overdue until it has hit and later with different settings, maybe some weeks later it is due again and it is quicker to re-use the settings you have already used instead of having to enter them again. I also construct compound filters that include the same filters but with different settings, dependent on recent history.
Hope you understand where I am coming from