Your hips are going to be higher than most due to your height. The main thing is to make sure you have a straight line from your shoulders to the bar and that you're using the bar to wedge yourself into position. The "usual" technique cues on deadlift could leave your hips too far behind you and throwing off your leverage.
Yes, Rodja's point is a good one and quite valid, as in differing body types and structures (ie: tall, heavy, thin, short, long waist, short arms etc. etc) may all have a contributing factor to your initial pulling style and leverages. There are quite a few guys who pull with higher set hips, or even a straight leg style. IMO, it would be best to learn a more standard bent legged form, (at least first) and see what works best for you over some time put in.
I think the difference to what you are describing and the thing to remember is, where or when you start the actual pull, you should have/see the bar moving up first and foremost and straight up in one continuous motion to lockout as the body/musculature sticks the form. If the hips move up first, or the legs straighten before the bar leaves the floor, or if the bar comes off then stalls some and other body parts move without the bar moving, you most likely have some work to do on form, control and again getting strong in the right order of movement.
I think the most important thing to remember is that the "muscles" are always in control of the movement, form and the weights and not the skeleton or ligaments, tendons etc. By this I mean, if your form caves to where your control of the weight at any time is compromised or is resting on structure, then the lift will most likely fail, or perhaps you may sustain an injury.
Congrats on your first comp, and did you get any feedback from any of the other lifters at the meet?