[Zooey]

Originally Posted by Tengokujin

They sealed. As they heated up, juice was forced out, but when the temperature dropped, like it's supposed to, the vacuum was formed and it sealed.

Yes, this.
You can test them, if you're still worried, by pressing down on the lid. As long as it is down, you won't be able to pop it up & down. If it isn't like that, I would say, if it moves, just put the jar in boiling water & reheat it, & it will seal tight for sure. (I grew up in a house with no pressure cooker, & a grandmother who did everything in a hot water bath canner. Even meat).
Or you could, if you find one is not sealed (but I am sure they are!), put on a screw lid & use them up. Or pour pariffine[sp?] on it which will seal it for months. (Both my garndmothers did all their jams & jellies & pickles with paraffine. Never had a bad one.