Why did I get XP capped after three games?

I played way more than that on Friday and yesterday.

Did you achieve some big commendation milestones or enter a glyph code in the classified section of waypoint?

> Did you achieve some big commendation milestones or enter a glyph code in the classified section of waypoint?

No.

> > Did you achieve some big commendation milestones or enter a glyph code in the classified section of waypoint?
>
> No.

Well then, I have no idea.