These traits were selected for in individual plants not individual pods. You can't grow a single plant and select the best shaped pods and expect that to be heritable, it's not. The differant pod shapes of a single plant come from random effects during the development of that pod.
If your goal was to select for some trait you would need to grow out a bunch of individuals and select for individuals that display those traits.
Finaly, if it was a mutation event you would expect all the tissue generated from the point of mutation to share that mutation, so you would expect some sort of localization or mosaicism. I don't see that, it just looks a bit random to me.
The upright position of fruit is controlled by the recessive gene up-1. All true Aji Russian Yellow have two copies of this gene, however just because a plant has the gene for upright fruit doesn't mean that every stem will be strong enough to support the fruit at full size.