I tried to do one last tie-down before this one went into flower and accidentally snapped the top. It was still barely hanging on so I hurried and taped it up and left it untied. About 2 days late it is sticking straight up like nothing ever happened. Upon inspecting it tonight I noticed this weird mark on the stalk right under where it snapped and was wondering if it due to the snap or something completely diffrent?

Could be due to handling/training? It's not a plant deficiency.
Which mark are you referring to, Bud?