Regarding Snape calling Tonks Nyphadora...

[doddiemoemoe]

No: HPFGUIDX 152135

I think the meaning is a little more simple....

I think he reminded Tonks of their "first name basis" due to their 
involvement with/belonging to the OOP...

I believe he calls her that after she states that she, "sent the 
message to Hagrid.."...hence Snape in his oh-so double agent 
way...gives a subtle reminder that they are (supposed to be) on the 
same side.

Yet another example of how Snape behaves when he is doubted..

I suppose if this is true then we must compare/contrast this with 
Snape's behavior towards Bella...(in MHO fairly similar)

If Snape can intercept a message to Hagrid...How many more messages 
has he intercepted? 

I suppose if I was to subscribe to a "Snape theory"...it would have 
to be PMSnape (as in puppet master snape in his role as double 
agent)...I truly do believe that he revels his role as double agent. 
I don't think double agents ever truly want an end to the war...it 
would end their occupation.

I love this theory because it explains ALL of Snape's behaviors that 
have both been suspect and championed.  The one true glimpse we ever 
got of Snape was through the pensieve...Perhaps snape was fated to 
always be "torn between two"..(hence the two adults arguing and the 
small cowering boy in the corner...perhaps he never recovered)

Doddie