When Lexy and Alex go back to her house looking for Chuky, she has changed her clothes, despite all her clothes being in the house.
When Charles Lee Ray shows the janitor's body to his fellow children, the janitor's left hand is missing, being replaced by a hook. When he later gives the janitor's severed hand to Eddie Caputo, it's a right hand.
Chucky unplugs a power cable, triggering an alarm in Caroline's room and a PA announcement can be heard for a resuscitation team. She was only wearing an oxygen mask, not something as serious as intubation or a ventilator. She wouldn't need resuscitation.
When Jake and Lexy are searching for Chucky in her burned down home, she picks up a rod of rebar from the floor to use as a weapon. Aside from structural support in concrete foundations, rebar is not commonly used in residential construction. It's even less likely in her home, which is described as an historical landmark.
The used needles (sharps). Chucky uses on the detective are found in a toolbox just sitting on the floor. Sharps have been disposed of in special containers for decades to prevent accidental sticks and re-use.