Blue tipped staghorn question

[Delphinus]

I have a blue-tipped staghorn acropora that is growing amazingly nicely, in fact, I'd say a 1/4" per week (or more) as of recently, but the problem is it's growing horizontally. It's a wee frag still, but at the rate this is going, if it doesn't start to turn "upwards" soon, I'm going to have a serious real estate issue shortly down the road since it's looking to take up a lot of "footprint" area.

Is this normal for this coral? BTW, I'm not sure of the exact ID. I can try to snap a picture of it later. There is this one branch that is making a beeline for a neighbouring M.cap coral... it appears intent upon piercing its neighbour like some kind of arrow shot from a bow. I've already fragged the cap once to give me an extra 1" or so of space, but that's clearly a bandaid solution at best. I have to either re-arrange this coral, or find the reason why it doesn't want to "grow tall" ... or worst-case, trade it away. It has such a nice blue colour I don't really want to lose it, but, I'm noticing I've put way too much stuff into my 75 and I need to give things some more elbow room. Sigh ... I promised myself I would never let myself do that (i.e., overstock), and here I am, realizing, it was an empty promise after all. (Shoot. )