The style is not an exact copy of the current version of the ATLAS style. SetErrorX(0.0001); was removed about 1 year ago, see Sign in to CERN.
The issue is reproducible easily by using the following lines:
root [1] TH1D* h = new TH1D (“h”, “histo from a gaussian”, 100, -3, 3);
root [2] h->FillRandom(“gaus”, 10000);
root [3] h->Sumw2();
root [4] h->Draw();
Info in TCanvas::MakeDefCanvas: created default TCanvas with name c1
root [5] gStyle->SetErrorX(0.0001);
root [6] h->Draw();
Ah, I see that “ATLAS” predefined option is not in root 6.12 and it is in root 6.14. This fully explain the issue. Why this is added to the root itself? Was it after some request?