Ken... can you point to the other thread please?
This is from the latest living rules under section E.4
"Order. You may perform your Ops in any order.
You may perform Ops on cards acquired as a result
of Ops (e.g. campaigns), as long as it is in
the proper (east or west) Tableau."
I stand corrected.
https://boardgamegeek.com/article/24210143#24210143 seemed to indicate otherwise, but I think that is a unique situation. Based on the E4 living rules, I think your interpretation is correct, unless Phil notes otherwise.