This is probably answered somewhere I just can't find it! I have like two weeks or so left on my upgrade. If I buy another one in the auction now will it just add time so like if I got a six month one it would be the two weeks I have left the six months or would it start over? 

It would tack on the six months - two weeks plus the 6 month :)

Lucius is correct!  It will just add 180 days to your current time. ☺

okay awesome! thanks yall!