I haven't played around with the settings a lot, but how are you setting up your tactic? Are you possibly using a 4 man defense and using "Trap Inside"? This is how I see it - your team will defend very wide in order to trap the opposition inside. That increases the distance between your defenders, possibly too much. I'm not ruling out ME issues either, but for right now, I'm trying to focus on what you can control at least.
I indicated earlier that the ME cannot distinguish human from AI.
So with that in mind, I am not dismissing that you're experiencing an imbalance. What I am saying is that if there's an imbalance, since both you and the AI have the same tools available, it is something you can control. If the AI is capable of something, so are you. If there's a ME issue, it's going to affect both you and the AI. That's good news, since it means there's something you can do to improve it (you can also make it worse, but let's focus on the positives ) but either you need to figure out what's going on or you should provide more information so we can advise you.
You mentioned the goals you conceded being almost own goals. It would be great to see how you set up and what those goals looked like. Without seeing it, there may be factors contributing to seeing what you are. Possible team cohesion or language/communication issues in the defense? Tactical familiarity issues? Are you possibly too passive/deep that you're inviting too much pressure? Are the defenders often nervous or anxious? Those are the sorts of questions I'd ask if it was happening to me and then I'd analyse things to try and find an answer. There should really always be one, in my opinion, if you're seeing patterns.