I figured it out: in firefox there is auto-fill of fields and it was auto-filling in the bot-field. I thought it would be better to use a realistic field label of “Phone” for the bot-field so that spammers would have less chance of detecting it, but I will change the label to something more unique.
So the only thing I’d ask is a way for me to see if there were bot submissions on request - just like there is a “spam submissions” option, perhaps there could be a “dropped submissions” option with a reason it was dropped.