They do mention it, it's at the end of their conclusions: "The results explicitly show the strong tension between null results from disappearance searches and

They do mention it, it's at the end of their conclusions: "The results explicitly show the strong tension between null results from disappearance searches and appearance-based indications for the existence of light sterile neutrinos." p7 So yes they are saying there is tension between disappearance and appearance experiments, which is which? "In this analysis, the measurement of muon (anti)neutrino disappearance by the MINOS experiment is combined with electron antineutrino disappearance measurements from the Daya Bay and Bugey-3 [16] experiments using the signal confi- dence level (CLs) method [17, 18]. The combined results are analyzed in light of the muon (anti)neutrino to electron (anti)neutrino appearance indications from the LSND [8] and MiniBooNE [9] experiments." p3 So yes they are saying there is tension between MiniBooNE results and MINOS, Bugey-3. I've no insight into the results either but GP's characterization of this paper was accurate.