I've had this issue for awhile now. I've seen this reported before and the cause was previously blamed on other addons. I've never had the time to troubleshoot this until now. However, I finally figured it out, and I feel stupid. I've been trying to make the map size BIGGER this whole time, not noticing that I CAN make it smaller. So it appears that sizing is working correctly, but it doesn't let me make the map as big as I used to have it. It seems like there is a max size limit, which on my 2560 x 1600 screen, is still too small of a map.

Thanks,

I was able to resolve this on my own. I changed the bolded text below from 1.5 to 2.5, in Scaling.lua

function OnUpdate(self)
local scale = GetScaleDistance()/SOS.dist*SOS.scale
if scale < .2 then -- clamp min and max scale
scale = .2
elseif scale > 2.5 then
scale = 2.5