USPS says my scheduled arrival day is today but I have already got my mail and nothing?

• moving truck companies
• usps postage machine
• cyber monday camcorder

The scheduled delivery day is today (Oct 18th). But I just checked my mail, just junk mail and nothing on my package. It also says in transit.

Should I be concerned or is it not always correct?

USPS says my scheduled arrival day is today but I have already got my mail and nothing?