If I can add, I think some of the difficulty here is just that there is no naming convention.
In the case of red Rambala pumilio, they are using the name of a town to identify a population and while there may be a small pocket hidden somewhere, even going back 20 years the frogs did not occur in the town itself, but in the hills to the ESE of town. To the west of Rambala is the Rio Guarumo to the South of Rambala is the town of Guarumo. Historically (and possibly to this day), maybe the yellow frogs occurred fairly close to the town of Rambala. I know that there were populations of a similar looking yellow frog that occurred a fair ways away to the south of Guarumo (and therefore much higher in elevation), so it wouldn't be a stretch that it also occurred a little to the north. As an example, the green Chiriqui Grande pumilio occurs between Chiriqui Grande and Rambala, so using either name would be just as accurate or inaccurate.
I haven't been there looking at pumilios for many, many years and I would guess that the populations are even more fragmented and maybe more confusing now. Anyway, hope this helps a little.
Motydesign, I hope you get there again. It would be interesting to hear what it is like there now.