The only issue I can think of is perhaps you are experiencing an issue of focus consistency, rather than something to do with AF adjustment per se.
In some cases AF inconsistency may have a camera hardware cause. The PDAF module in the camera may have taken a knock and is now loose or out of alignment. It is a small but complex bit of gear and it happens. If the lenses focus fine in Live View, you may be able to narrow the issue down to lenses or camera.
But sometimes it is very much a lens related problem. With most of my lenses, if I point them at something static and shoot say 20 shots, 20 shots are in-focus and the lens just stays on-target. Focus performance is consistent, even if AF adjustment may have been required to begin with.
However one Sigma HSM lens of mine is different. For example, if I shoot 20 shots at the same static target, 5 might be out of focus with that lens. While shooting, even though nothing has changed on the camera or the focus target, the camera thinks it needs to order some small adjustment to focus for 20% of the shots. Some lenses are simply more 'fussy' and in-decisive than they need to be. As a result, the focus is inconsistent with this Sigma.
Last edited by rawr; 10-12-2014 at 11:18 PM.