This is EXACTLY what just happened to me at my command as well. I regret waiting to hear from my command about the sep message in the first place but didn’t know better. Luckily I didn’t miss my sep date like you did. I hope it’s all up hill for you from now on!
So sorry you ended up having to extend and hopefully your orders come in without any issue as well. Does that new date reflect in NSIPS for you or is that new sep date only visible on your separation message?
My command also missed my message by an entire month which I didn’t know until I...