There's a listing for "Junior Software Engineer", but I don't see anything for "Software Engineer" or "Ex-founder" on the page you linked. And the salary ranges seem implausibly low, at least for Americans.
> Dallas, TX, US $10K - $30K
In the USA, this is below the poverty line, and less than what you make wiping down floors in a fast food burger place off the highway in a shady part of town with no health insurance.
If multiple unrelated people are so mislead that you have to answer questions about it, it's a good sign the issue is your communication, not their understanding of it.
Salaries vary widely around the world, as you know, and we hire in almost all countries. We have team members in 22+ countries, including US and EU. If you tried hiring globally I expect you'll find many talented people won't apply for your positions if the salary range is too far out of their expectations.