I have a dweller working in my power plant and when I go to my power plant he isn't there so I go to my dweller list and click on the dweller I can't find and lone behold he is highlighted in green right where I thought he was but when I click somewhere else in the room and look were it said he was he isn't there or anywhere else in the vault and I can't even grab him to move him somewhere to produce products or to fend of attacks and he is the only dweller with a power suit armor and the best gun I have please fix these problems its really destroying this game for me and I really like it but its just not fun with all these problems and each day there seems to be more wrong.

Have you tried re-loading? This happened to me once and restarting the game fixed it. It has never happened again, after that.

Also, please use punctuation marks. Asking for help using a written medium properly is more likely to return positive results. Your post was an awful read.

I had this too, but he was simply behind another dweller. They have sunken floor areas that cause the 3D engine to fail to render the 2D asset when they stack a certain way. Again though, the appear entirely invisible when completely zoomed out.