Nope, you didn't imagine them. I have had that happen with brand new tubes. Pretty sad when you think about it....Tubes so cheap
you can't even air them up once without the valve popping out of the tube. The LBS was like "man that sucks", and didn't even offer
my money back or a replacement tube. Half them time now I want to inflate them while I am standing there in the store, lol.,,,,BD
__________________
So many bikes, so little dime.