So I am not a fan of whining, especially in MFN, so that is not what I am trying to do here, but I am trying to figure out how when I changed my offensive gameplan settings last night (and saved them, made sure of that) I woke up this morning and watched my offense not follow my gameplan at all. Then I went to the settings and they were set differently than I have ever set them. Now I know I would not have won the game (my new defensive plan still gave up 500 yards), but I am curious if this has happened to anyone else?

Yes...the one and only title game that I have played in, my lights-out 65/35 pass/run ratios that nobody had stayed within 17 of all season got completely futzed around and we ended up 60/40 run/pass instead for the sim...also took many of the medium plays out of my gameplan and swapped in short passes/additional runs and I ended up losing the game 17-13 or something like that.

I had it happen twice, both in LC games! And I thought someone might be hacking my account. But, I think what happened was that somehow I hit a "load recommended" or it just kicked in automatically, but has only happ'd during playoffs. I havnt had it happen again this past year. Now, Im always real careful on gameplanning for a playoff game, and will double check it before gametime if able to get on.

Well, the above answers cleared up all the problems I have had regarding possible hacking into my account. I've had my depth charts, game plans, etc, changed even though I always check them 10 min before game time.
This past game AI used a play not in my gameplan. It didn't cost me but it was strange.
Thanks for the help solving my "hacker mystery" problem.

First time I've seen this, but glad to know I'm not alone! I've had this happen several times over the years for no apparent reason, plays that are not selected in my playbook being run with disastrous results.

Obviously a glitch in the matrix...