I want to know will i be responsible for paying my job back for disability if I resign after coming back? I can't imagine that would be the case but since nobody here is familiar with your employer's disability plan, it's impossible to say for certain.
Do I have to at least return to work for two weeks or more so i will not be financially liable for anything? Same answer as above. None of us knows what your employer's policies are.
Also, I need to know if there is a possibility that I will have to pay them back anything since I have been an employee for less than a year? I can't imagine your short tenure with the employer would make any difference.
I thought I read somewhere that if a company grants u fmla they cannot later go back and change it while u are out. If you have been with your employer less than a year, then this the FMLA doesn't apply. Your employer may have (generously) extended medical leave to you but you have to be with an employer at least 12 months to qualify for FMLA.
The only thing that occurs to me that your employer might wish to be repaid for if you don't return is any medical insurance premiums they paid for you while you were on leave. Since everything you are asking about is a matter of company policy, only your employer can answer your questions.
A person, who is nice to you, but rude to a waiter, is not a nice person. (This is very important. Pay attention. It never fails.)