You said election is unto service and calling. And predestination is unto glorification
To elect is to choose and to predestinate is to foreodain
Chosen unto a purpose. Predestined to adoption/glorification
But God didn’t choose or predestinate until we chose, according to you. So this choice and this predestination did not happen until we chose, according to you
Yet God already knew what we would choose, so as far as He was concerned it was immutably known in eternity past.
So why would He have to wait for us to choose us or predestine us to anything
Waiting? How about this verse .
1cor 12 .
12¶For as the body is one, and hath many members, and all the members of that one body, being many, are one body: so also
is Christ.
13For by one Spirit are we all baptized into one body, whether
we be Jews or Gentiles, whether
we be bond or free; and have been all made to drink into one Spirit.
When does this take place? Are you baptized into one body before or after you believe? So maybe God is waiting until a person is immersed into the ' one body ' .