problem using 'Suppress if duplicated' with a field in a Crystal report

[Eych]

I have a field which I do not want to put in the Group Header, but
keep in the Details section. I selected 'Suppress if duplicated', but
it still duplicates.
Here's an example:

What I want to show in the report details section:
A 1
2
3
4
B 1
2
3
4

What actually shows:

A 1
A 2
A 3
A 4
B 1
B 2
B 3
B 4

like I said, I don't want 'A' and 'B' as Group Headers on a separate
line, I want their first occurence to be on the same line as their
first corresponding detail field ('1')...

thanks in advance...

[Eych]

thanks...