Oh boy, shady tenant???

[Nadir M.]

Here is the issue, 

Picked a tenant to move in over the weekend. She was very desperate to move in because her previous residence had some sewer issues and had to live with her son in law. Tenant also said she has some relatives coming into town so she wanted to move in soon so it doesn’t get too crowded at her son in laws. Long story short, she moved in. She transferred utilities in her name, she has yet to give me renters insurance even though she said she applied, and She made the deposit and prorated rent payments. So I decided to give her keys. Once she moved in, I’m still attempting to collect renters insurance. All of the sudden, apartments.com (not sure if I recommend this site) said tenant has insufficient funds. I called the tenant and she said she called apartments.com and changed her account to a bank that the site approves. I called apartments.com to verify as the operator said that she did change bank account to an authorized bank accepted by apartments.com. The operator still said that the account still has insufficient funds. Tenant said that she has plenty of money in the account. Also the July 1st payment is still in old unauthorized bank account. So basically this tenant will be late prorated rent, deposit, and first months rent.  She grabbed the keys couple days ago. I wish apartments.com would have said that tenant had insufficient funds from the beginning and not 72 hours later. So what do I do now? Tenant is in process of moving in but is there anyway to reverse the move in process or halt so I can chose a new tenant? The lease has already been signed. Background check is clear for all adults. Credit score for both adults above 685. Where did I go wrong? Did I go wrong? What do I do now? Is this tenant truly trying to do right?