You just spent a lot of effort addressing a solution that does not match the symptoms (out of true would show up all the time, and only at certain points in the wheel rotation) and to an OP who shows no inclination or ability toward fixing things himself.

More importantly you gave not only unclear but also incorrect instructions. An unskilled person is not going to know which spokes will "pull away" and one needs to specify that clockwise to tighten is done looking from rim toward the hub, rather than down at the rim. The incorrect part is that if one only tighten spokes on one side then you will pull the rim toward the hub (out of round) at that point and also increase the overall tension of the wheel. It's also inappropriate to tighten only one side if the other side is very loose, as that indicates a physical bend in the rim that cannot be fixed with spokes. Truing should always be tightening and loosening.