No, it is not just you and your friend
! The stuff-y(ier) D is a fairly normal thing. You will read it on any comments made of a horn (that it has it or it isn't so stuffy as one would expect) I have had it more or less on every single tenor which I've had.
The funny D is, in all likelyhood, an overtone. I actually have it every now and then on tenor and alt if my enbouchure gets sloppy or tired (maybe if I keep on trying I'll have it on Baritone too
) I play a D2 and it comes out a G (I think). I suppose it comes down to weak embouchure and lack of breath support, really. Perhaps too soft a reed too.
Nothing to worry about it! If I understand this correctly (but I am sure that more knowledgeble members will correct me if I have got this wrong....
) a stuffy D can be cured by one (or both) two things : a different mouthpiece (or its position on the cork) or very slight tweaking of the height of B and Bb.......and long tones, very many long tones!
What else?
The funny D is, in all likelyhood, an overtone. I actually have it every now and then on tenor and alt if my enbouchure gets sloppy or tired (maybe if I keep on trying I'll have it on Baritone too
Nothing to worry about it! If I understand this correctly (but I am sure that more knowledgeble members will correct me if I have got this wrong....