Ah, the cobra cold roots myth! It amazes me that people mess about with ice cubes and water pumps.
My cobras live in full sun and are kept in conditions no different from sarracenia. They are in big black pots and some are in peat/perlite and some are in live sphagnum. They sit in about 5cm of...
At 93 degrees you might have scorched them, especially if they're young and the roots aren't deep yet. Spraying them probably doesnt help either - sulphur is ok for rhizomes but you don't want seedlings sitting in a puddle of sulphur water I would have thought.
Sulphur is pretty ineffective...
Bigger pitchers are normal for the plant in reality. A larger number of smaller pitchers is likely to be because your other division has less roots or is more stressed. Over time it will revert to fewer, but larger pitchers.
I keep mine in the same setup as my sarracenia - potted up in peat, sitting in a couple of inches of water, in full sun in 90F summer greenhouse heat.
They don't need any particular care or ice cube nonsense.