Coleene,
What do you mean that "new packages aren't supposed to swarm"?  Bees swarm
when they are too crowded IN THE BROOD NEST, or when the queen is short of
pheromone so she cannot inhibit swarm cell construction.

You said there was still foundation in the hive which was started on April
20th.
Haven't you been feeding them 1:1 sugar syrup CONTINUOUSLY since April 20th?
A new package on foundation should be CONTINUOUSLY fed 1:1 syrup from startup
to about September if you expect to get 30 frames drawn and most of them
filled with winter stores.

Now you really HAVE to start socking feed to them this late in the season,
but it can be done.

I hope I have helped.

George Imirie