@synth618 Update:
I was able to get the rest of the 20 update sounds to work! But because I was uploading individual sounds, I had to individually import the ones that would not send to the synth, twice, [basically a second time right after doing the first time, without resetting the preset], and it worked.
For those who may have run into this problem if any [maybe my computer is just weird], this worked for me.
I did this way rather than in bulk, because I created some of my own sounds that occupied some of the presets between 30 and 50, and didn't want to lose them.