How? Fear the Walking Dead came out 5 years after Walking Dead, and started right at the zombie apolcalypse whereas Walking Dead skipped the start and opened with Rick coming out of his coma which was a good bit of time after the start.Fear the Walking Dead is ahead of Walking Dead. Well, at least it was when it started. I looked at the timeline here to try and see how they'd make it work but I don't watch FTWD so I wouldn't be able to make any sense of it. Morgan would have to have headed west from the GA region after he, Duane, and Rick met and then separated. Then, we're to believe he went back east and found Rick's group ? Or did he go west after Rick, Carl, and Michonne found him in his small-town 'home' ? Again, he is supposed to have done that and then returned east ? I just don't see how they make it work without holes in the "story".
So Fear has to be at least 5 years behind Walking Dead. That's if we went by real time. TV time though, Walking Dead started at a later point (Rick's coma), where Fear starts at the beginning. Plus Walking Dead has had a couple time jumps of a few months or more. So I can't see how Fear could possibly be ahead. I think you misread the timeline you posted, as it shows Walking Dead being at least 2 years ahead of Fear.
Unless of course the Morgan that's in Fear will be the Morgan just after the premiere episode, and thus will be before he came back to the show. That's the only way I see it working, even then I see the same holes you see.