Of course, dont worry!
H1, H4, H7 etc are all bulb types, they are different sized, some of them may have one filament (For low beam) some have 2 (for low and high).
Once the Projectors are installed these numbers go out of the window, as they are for the bulbs that have been removed, the h4 bulb has a metal shield that fits into the bulb hole, that's where the projectors and h4 come together that's all.
Originally the fazer has low beam on the left, and high beam on the right. (I think)
Mine now has low beam on both sides, and high beam on both sides
I was thinking of doing that too, but they are quite expensive, and you would have to do a lot of damage for it to not be fit for purpose