C. walkeriana question

[mab3362]

Hello All,

Generally I have found the immature C. walkerianas tend to be bifoliate and when maturing, they become unifoliate. However, this growing season, I have had several older plants started producing bifoliate growths and some of these plants are quite old. Everything looks great overall, many new growths and all are thriving. They are semi outside and it has been quite hot but they are watered almost daily in these 100 degree conditions and have fans and mist system. Should I worry?

Thanks!
Micah Bishop