And you can see from rear grill through to out the front grill?
I guess I’m not getting where you took that picture from. I haven’t disassembled mine, I can just see that the duct sticks all the way down from the ceiling to the grill.
Edit: mine doesn’t really blow any air out the front. Ever. So, I was thinking that maybe ours has this installation error…
Remove the air filters and you can get a pretty good look. That’s also what’s needed to remove the cover, to get to the 4 screws. Be careful with the air filter cover, it is beyond tricky.
Reach in and play with the front air flow lever while it’s running, see if that helps your troubleshooting.
But there are different Mach 10 models, this is how the one I have is set up and I'm happy with its performance.