When K arrives home from splitting up with Dougey, you can see its daytime outside but the rest of the scenes take place at night.
You can see the strings on the stockings when lady is magically putting them on her leg.
When Dougy is showing K the information on the computer, the word "Caucasian" is misspelled.
If the Temptress can't be seen in mirrors how would nobody not know she's not human in a place like a bar that's full of mirror. The scene where K first meet her they are sitting in a booth with mirrors. Wouldn't he see or others see she has no reflection in the mirrors.