I recently got back from a short bouldering trip to yosemite, and when i was there, for the first part of my tip, i didn't have a guidebook. I went around trying the coolest lines i could find. A week later, i came back with the guidebook and could find all but two of the lines i did. For me, i thought they were obvious lines, and was shocked they weren't in the guidebook. The guidebook said to report first ascents to supertopo, and im curious of the grade/if they were first ascents. So, the first one is in Camp 4 Center, and starts on #64, but traverses across the lip, and tops out with the mantle on #62 (this is page on page 127). I thought this to be a v4+, but possibly easier, since it was 100 degrees when i did it.
The second one is also in Camp 4 Center and is between #5 and #8, on the arete, where there used to be a tree (and the tree is still in the guidebook) (This is page 122/123). Once the tree was cut down, it left a nice line with a stand start starting on a good undercling, you move your right hand to a sloper, and do a bad gaston move, and throw to a sloper/jug, it then tops out on the slab near #5, this one was highly chalked so i doubt it was a first ascent. It felt about v8, maybe easier because it was another hot day when i did it. But yeah, i would love to know if you have any info on those climbs, or know if they've been done.
The first problem described has been done many many times and has no name. I'm having a harder time picturing the second problem, but from your description of the caked chalk I think you have your answer.