Tracking Out Again?

[Guest sharpy]

hi roomies, had my tracking sorted out last week but when driving straight the steering wheel has gone astray again it was perfect when it came out as i checked it myself, i know for a fact that i havent hit any objects or kerbs since having it done they replaced the bottom ball joints as that was the cause of the tracking going out the first time so anyone has an idea of why this is out again thanks sharpy

[seatkid]

They didn't tighten up the nuts on the track rods......