Lena,
My question about 'how do you know your reading is accurate' in NOT a fault with you. It's the many faults in the method.
I guess I mentioned you 'meter pointing' question when I posted to Mix. See he rec. pointing it up. You didn't. That means if he calibrated your system with the same meter he'd set if diff. than you.
My point being that neither of you could prove you're right or more right.
Personally I think pointed forward would be more correct (kinda-sorta), so I would change it if I were you.
You're really open about being a newbie, but I think your willingness to 'look deeper' will quickly expand your knowledge beyond many here (forums in general) who "heard it one way" (whateverthe subject) and lock that into thier brains as the absolute truth.
The sick thing is the more you learn about the infinite variable of audio, the more you find that damn near anything 'might' be true... or false.
And nobody ever really knows for sure just what they just heard. You, me, anyone. It's crazy.