I notice that the summon point cost of the tier 1 creature for the City summoning theme is 50 pts, but at 2nd level the average character only has 40 points so it is dispelled.
For a new player, who probably won't be choosing a special theme, this might be very jarring and will most likely result in either frustration (or death) if they can't actually cast Summon Creature I until 3rd level.
Fixed.
Balance suggestions for summoning themes are welcome, it will take some time to get everything polished there.