new and repotted Paphiopedium has yellowing lower leaf

[dial15]

I received and repotted my first Paph. delentii 'Pink Sky" x sib. mid May. It came with with a tiny new plant, 2 leaves, starting from a terrestrial root, I am assuming. I replanted at the same level it was in a 2.5 "size pot but terracota using fine bark with charcoal orchid mix and some additional sphag. moss lightly interspersed. The main thick root was laying at the surface exposed and I repotted it the same. The lowest small leaf on the main plant has turned yellow and now becoming brown where it grew from the stem. The lowest leaf on the offshoot plant, now with 4 leaves, is resting on the media and now seems to be taking on a yellow hue. It is growing directly under and into the second leaf of the parent. Both plants have continued growing. The humidity is about 50 or 60. I let the top of the media get dry but only for a day or two at most. Should I be worried? Any advice appreciated. Can't upload pics as this is my first post.