Mark 10:29-30 vs Matthew 19:28-29: when will we receive our reward? Why is there a difference between Mark 10:29-30 and Matthew 19:28-29? 


  Matthew 19:28-29 (NIV)
   Jesus said to them, “Truly I tell you, at the renewal of all things, when the Son of Man sits on his glorious throne, you who have followed me will also sit on twelve thrones, judging the twelve tribes of Israel. And everyone who has left houses or brothers or sisters or father or mother or wife or children or fields for my sake will receive a hundred times as much and will inherit eternal life.
  
  Mark 10:29-30 (NIV)
  “Truly I tell you,” Jesus replied, “no one who has left home or brothers or sisters or mother or father or children or fields for me and the gospel will fail to receive a hundred times as much in this present age: homes, brothers, sisters, mothers, children and fields—along with persecutions—and in the age to come eternal life.


Matthew seems to have Jesus talking about Heaven/the Kingdom of Heaven but Mark seems to have Jesus promising great rewards "now"? Which would make sense if you love your Church family as much as your genetic one but 'lands'??? What with the hey?! One of them must be misleading because they can't both be correct accounts of Jesus's words!
I don't see Matthew as referring exclusively to the next life. Why do you think that is what it is saying?

In fact, Matthew doesn't give a time frame, therefore, it is less exact, but not contradicting Mark. They are both saying the same thing. Even in other translations, I see it as reading into the text of Matthew to say that it is referring exclusively to the next life. The text of Matthew merely says that those things will be given one hundred fold, and the text of Mark says this as well, but clarifies that it will be given now, and eternal life will be in the next life.