Meet with probate litigation and elder abuse counsel.

Too complicated for this forum. Review with probate litigator.

What you describe is usual case. Wills are usually individual and signed by individual testator. Rare exception for joint will. Joint trust...

Possibly. I need to see deed, trust, additional facts related to deed changes to opine further.

Possibly one-third. However, I need more case specific information to opine more definitively.

Don't know what to do? To transfer or inherit property after someone dies, you must usually go to court. And dealing with the courts and the...

Possibly. Conservator of person may deny visitation for good cause. Your attorney can assist in obtaining court order restricting visitation.

No. You are not responsible for outstanding medical bills and credit card debt of deceased parents based on minimal information provided.

Agent signature not usually required on POA. There may be exceptions. If mother has capacity she may revoke existing POA and execute new POA.

This is common problem with WFB. Retain counsel to demand they complete investigation, share results with you.