Sleeve anchors not going all the way in?
How did you check the depth of the hole? You should be able to get out the ones you pounded by putting a nut on them and levering them out. You can also get fancy and make a pipe sleeve, some washers and the nut and screw it out. From the photo it looks like an SDS rotary hammer could be used to drill deeper BUT depending on the concrete, maybe you are trying to get it trough a piece of rebar. I guess a telescopic magnetic pick-up tool could tell.