I am not a newbie at photography. I took classes in the mid 90's and have been shooting ever since. I am not a newbie to film either. I have had several darkrooms. I have never shot APX 25 before now.
The stand development was to introduce a N-2 development since I had 10 stops of light and most all the detail was in the mud. So I brought the mud up to zone IV which would have blasted the highlights way out. Fortunately there is little detail in the highlights in this particular scene. I will put the negs on a light table and take a closer look at the highlights in the next day or two.
There are some links online for developing APX 25. I knew that I needed a contraction so my agitation was sparse and mostly in the first minute or two followed by longer periods of stand and the occasional inversion.