I know these can be a bugger and once you have touched them it can be a world of hurt to sort it! If all is well then I don't think you should ever have to touch them tbh.
Maybe the ECU has self learnt and tried to solve it but getting mixed up because the TPS is in the wrong position (after you adjusted it). Have you disconnected the battery overnight to reset everything? are the yellow paint marks still on it from the factory?
If I were you I would disconnect the battery and put it back to the paint marks/original position is possible. maybe clean the MAF and check resistance on the O2 sensor etc too. Then re connect the battery the next day. The car will idle high probably (mine always does after an ECU reset) for a day or two and then after that see where you are with the idle and voltage etc. Have you tried another TPS in case this one is faulty? If you can get hold of one even to borrow, that might be a next step if reset etc doesn't help
Not an expert on the TPS but that would be how I would tackle it