Maxwell's pants do not match his suit: when in his office arguing with his mother over Fran, his jacket and vest are dark blue, but his pants are black and clash with the rest. (Many men choose to wear different pants than their suit jacket, but in that case, the pants color is a sharper contrast with the jacket, and their vest is never the same color as the jacket: in such deliberately mismatched color choices, the vest is often omitted or a different color altogether. In fact, in the following scene in Fran's apartment, Max is wearing the dark blue jacket but he is now wearing it with brown pants, indeed a sharper contrast; his tie picks up the pant's brown, restoring harmony, and his jacket is buttoned all the way up, which conceals the vest. if he is wearing it.)
When the actress who plays Mrs Sheffield, the mother, picks up her purse near the white tulips, the actress does not react upon seeing the flowers. But she had just fought a woman (Fran) at the florist over them. A pause upon seeing them---to acknowledge the coincidence---would have been more in character, a nice way to tie in the scene that comes next, when Fran opens the door for her. Since she had fought so hard to buy the tulips that Fran got, it would have made sense to notice them. Instead, the actress does not even react when she looks in their direction to pick up her purse.