If that yamadori is a Shortleaf Pine (Pinus echinata) then the light blue-green flush is a secondary or tertiary flush that can emerge from needle nodes as well as dormant buds back on old bark (like at the base of the trunk). I have been collecting this species for some time now and that is very normal behavior from them. SLP’s are not exactly double flush, they are multi-flush. I have had as many as 5 flushes in a season, and three flushes is quite common (in my region, SW Missouri).
Here is a link to a thread on the species | Pinus echinata | Short Leaf Pine | General Inquiry
Also, here is a video from Bjron Bjornholm working on one of my SLP Yamadori that was shown at the 2023 US National Bonsai Exhibition | Bunjin Pine Bonsai - Experimental Techniques | Bonsai-U