You are getting the generations of Ellis families confused.
Also, you may not realise just how many Ellis families there were in St Just!!!
In 1851 there were over 30 families in St Just, and more than 10 in the adjoining parishes. As they used the same names, and often without mention of their mother's maiden name, it is easy to confuse them.
Send me your email via my email & I can send you my research. email@example.com