December 2016
December 2016 - last edited December 2016
What do you mean by "I'm having the same problem"?
That your readiness rating drops over time is by design, so the "normal" readiness rating is 50%. You can only hold the rating near 100% if you constantly play MP or the Mini-game on the N7HQ website.
The readiness ratting is also not stored in the save games, but online.
Edit: That means if you had a 100% readiness rating and it's gone now despite playing MP or the Mini-game it is eiter a server or a account issue.