My Mom owned here home (no mortage) and put my name on the property with a quitclaim deed (joint tenancy).

Question

Shortly before she died in 2013 she created another quitclaim deed (joint tenancy) with a third party.  
 
Quitclaim Deed  Joint Tenancy 1 (My Name, My Mother's Name) 
Quitclaim Deed Joint Tenancy 2 (My Mother's name, Third Party) 
 
What % share am I entitled to upon the sale of the house? 
 
Wording from Quitclaim Deed, both deeds have the same wording, with the only difference being the parties involved: 
 
 "the grantor, for and in consideration of the sum of $10, the receipt and sufficiency of which is herby acknowledged, has remised, released, sold and QUITCLAIMED, and by these presents does remise, release, sell and QUITCLAIM unto the grantees, their heirs, successors and assigns forever, not in tenancy in commmon but in joint tenancy, all the rights, title, interest, claim and demand which the grantor has in and to the real property, together with improvements.

Timothy Canty · Answer

Your Mom's conveyance of the 2nd deed destroyed the joint tenancy between the two of you. You became tenants in common with her. In the absence of language to the contrary, you are each presumed to own 50% of the property. Her new deed to the third party created a new joint tenancy with the third party only as to her remaining 50%. Upon her death, the third party assumed full ownership of your Mom's interest. So now you each own half.

Q: My Mom owned here home (no mortage) and put my name on the property with a quitclaim deed (joint tenancy).