Are you sure it requires manual adjustment? Maybe things have changed, but a couple of data points on my end:
- In the old days when all flights were credited based on distance (though was likely pre-merger), I did have bonuses auto-adjust when a new flight posted. i.e. hit a new status level on a weekend trip on outbound on Friday, return on Sunday posted with lower status bonus, then re-adjusted a few days later after the new status was fully through the system, or some kind of process ran
- On a non-USA to USA address change: Left US in 2013 (before $-based earning), changed my address back to US in 2015 sometime, or maybe was early '16. Hit status while abroad, but most on * carriers. When I changed my address back, all flights, going back to the start of $-based credit, were automatically lowered to silver earning (from gold or plat, can't even remember) since my spend was only at silver level, even though it was for years I was not in the US. Had to call to get those re-instated. Same deal with my wife.
So it is possible that it will auto-adjust on its own, just may take a few days. If not, definitely call.