ATAT - you might already know this stuff -so I hope I am not annoying you - and I am not trying to down play the amount of time that court stuff takes - it can be frustrating - but did you have court approval/order on 2/28 for service by publication or was that the date of the first publication? If just the court's order - then publication had to happen after that - so in time frame
2/28 court approves
3/10 publication (and then possibly more publication dates)
And 30 days to respond

It will probably take more time if just the decision to get the court's order took place on 2/28.