Husband in Admin processing for 17 months now, confused about expiring soon message

[Insha 17]

Hi, my husband had his interview on february 27th of 2018 in Pakistan, they gave him a 221g with the request of more proof of our relationship such as more pics and conversation screenshots which we submitted within 5 days. Anyway, its been 17 months now, and as I posted in a previous thread we received an expiring soon message from the embessy recently on july 2nd. The issue cleared up and they changed back to admin processing. My concern is, the message doesnt get sent out until after a year has gone by, everyone on this forum that has received this message got it 11-12 months after their interview. Since ours was in feb 2018, why did they send our message to us 16 months after ?? Shouldn't we have gotten it february or march 2019 instead of july 2nd? Maybe im looking into it too much, but now Im thinking maybe they didn't look at the additional documents we submitted until july or august of 2018 which is why they sent the message out july 2nd which would make it a year. Any opinions on this would be great. Appreciated and thank you.