First pic looks like a lesion from water being left on the leaf, do you mist? Or could you have left a few drops of water on the leaf overnight? Are these spots growing? A good way to check if the spots are growing is circle them with a pen, if the spots aren't growing then the will most likely dry out and be fine.
The other pic appears to be a developing from an old cut, if it is i would cut back another inch and dust with cinnamon. Only the cut should be dusted, as cinnamon will desiccate plants of put on too much of them.
And i see you said all 6 plants have these spots im wondering if it could be a mild form of sun burn??