Well, I was on my way from Skingrad to Anvil, and I went into an Aylied Ruin along the way, and found a Great Welkynd Stone. Having never found one in my gaming before, I went on UESP to check out what it was, and found that it's for the main quest. I also found that, if you find the Great Welkynd Stone before you're actually given that quest, and you turn in the Welkynd Stone at the same time as the Tiber Septim armor, there is a glitch where Martin doesn't actually put on the Tiber Septim armor, thus making the Defense of Bruma quest rather difficult.
Now, I am not playing on PC where I can mod or use console, I'm on the X-Box 360. Is there any kind of workaround I can use in this situation that will get Martin to wear the armor? Or anything I can do that will make the Defense of Bruma quest not incredibly tedious and obnoxious, seeing as how it's seemingly more difficult to keep Martin alive due to this glitch?