How do I note that rent has been paid ? The property tab shows rent still owed on two properties

Adventurer

I have reconciled my bank accounts, noted the rent income on each property, but as you can see below, two of my properties are showing that rent is still owed ? However, all tenants have paid - and paid timely.

In addition, as you can see, one of the properties has the little calendar icon next to a zero value - why ?

The bottom line of $ 2,025.00 is the prior question I have posted as to why one of my properties has the tenant listed under the property AND the tenant also listed under Unknown Property - which is now also saying that they owe rent for the three months.

Help me to understand, please !