After Jason fixes Hoyt's tie, his top shirt button is buttoned and unbuttoned in different shots.
Bill has a small closed-bud rose buttonhole in one scene, then in the next scene it is a much larger semi-open rose buttonhole, at least twice the size.
Jason's freshly-made coffee does not release any steam, despite the sunlight streaming directly onto the mug, which would show up the water vapour that rises from all hot drinks.
When we first saw Bill's daughter in the beginning of the show the last family picture and a scene with his family, his daughter has brown hair. In the episode "Thank You" they show a scene when this happened and the girl is now blonde. Bill also looks at the family photo photo, but it is setup different then in the very first episode (with the blonde girl also).