The way out of this is easy. Get extra nuts and washers for your bolts. Snug the sleeve as before and then put on the spare nut and washer. Finger tighten it and then use a spanner to fully expand the sleeve. You can then take off the nut but if fixing a heavy baulk, batten, ledger, post etc I would leave it on and chop with a chisel a suitable recess/housing to go over the nut. To put on the post it is a simple matter to put it up to the shank, level or plumb and then give it a tap to mark the position for the hole. The extra nut will keep the plug in the sleeve locked in place.
Yesterday I was taking the bolts off to hang a new gate. Go backwards. Release the locking nut several turns out from the wall. Tap on the top of the shank to drive the plug back into the hole in the concrete. With a vice grips jiggle the shank until the sleeve comes back into the loose state. Remove.
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