you cut it above a gorwth node.. that's doing it "right"
if you plant to bend those 2 branches horizontally or in any extreme way, leave the stem a bit longer where you cut. It'll be less prone to split from training those two branches away from each other...
if you just top and let it grow, it's a non issue.
split a few stems and you learn to leave that nub a bit longer. you may have to split a stem before you realize the usefulness, lol.
Plant training should have an end target for the full canopy. 12 colas? 20? whatever... then make it happen in a systematic way to reduce vege time and money required to get there. If you do that, you are doing it right and intelligently.