Dream of died, grandfather, mother

My grandfather recently passed away, 4 months ago. I was with him when he passed gently at 93 years old and in reasonably good health. In my dream, my uncles and mother had led me to believe he had died but instead they moved him to another seniors home. I found out and was trying to find him. i could see him and he couldnt understand why I never came to visit him anymore but I couldnt get to him to tell him I was told he had died. In my dream I kept telling myself this cant be, I was there with him when he died. I SAW him. How can he still be alive and why would I have been lied to and why can I not get to him now to tell him I didnt know he was still alive, thats why I hadnt come.