Customer slammed her fingers in a manual door at my store.

This is a personal injury issue, not a business issue.

If a bill has been written off by a hospital can they now undue the write off and come after u for payment 2yrs later

Yes

Employee rights case

No, you don't have a case based on the facts you provided.

No, the Plaintiff would have to get permission from the court before filing a first amended complaint after an answer has been filed by any defendant.

Is it legal for an ortho to ask for money upfront for braces before treatment begins?

Depends on what the contract/agreement you signed with the ortho says.

Is there any way to ask for my loss from a guy who filed bankruptcy?

No. After bankrupt, your judgment is gone and can' be collected, unless you placed a lien on property the debtor owned.

My neighbors rain runoff drains onto the side of my house and fills up going into my house.

What is your question?

Breach of contract, how do I make them pay

You can sue them for breach of contract. A full consultation, including reviewing the contract, would be necessary to properly advise you.

Can I stop my landlord from coming into my apartment even with a notice?

Please see Civil Code Section 1954. http://www.leginfo.ca.gov/cgi-bin/displaycode?section=civ&group=01001-02000&file=1940-1954.1

What your boss is doing is not illegal, however, you should talk to HR about it.