I have noticed that the World Imagery layer appears shifted in certain areas. I tried every transformation I could find, thinking it was a datum transformation issue, but that made no difference. I noticed it when trying to show the imagery with a parcel layer provided by the county I was in. The parcels were shifted about 20 feet off from the underlying basemap. And it seems to have popped up over the last six months, as I didn't have this issue in the same areas at the beginning of the summer with the same parcel data. Using the World Imagery (Clarity) layer, there appears to be no shift, so maybe try that for comparison.
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