Hi Mike,........Ok........

A B C# D E F# G# A = A major scale
1 2 3 4 5 6 7 1

vs where my chords are...........

A (B) (C#) D E F# G A
1 2 3 4 5 6 b7 1

but..........

D E F# G A (B) (C#) D
........is the D major scale and they are all there as well.

I understand what you are saying about the mixolydian scale and all.
The A is always there in the middle of each little chord pattern change, but the song(verses) starts with the D and it is in the chorus as well.

The B and C# are the only chords not used in both key possibilities, which further clouds the issue lol.

I'll just have to identify the melody notes and/or post a demo I guess.....would make it easier.

Thanks,
Tony