I did indeed look for that but I'm not sure if there were any other. The puncture was there, and after inflating the tire some of the sealant came out through it and indeed closed it off - not an immediate thing, but took maybe about a minute before it solidified. You could hardly tell it was there after closing the hole, so I'm not sure if there were others (although I assume there were).

Right now I'm running a regular tube without sealnt with the Conti's - I'll do some miles on it that way to see how fast it punctures.