inventory and lvls lost upon loading in to safe house.

was in a blocked off safe area where no spawns could get in or spawn in(or so that's what your game is supposed to do right?).  i had a full inventory and was planning to build and enchant alot of my things.  i was at lvl 38 and full armor and health and saved and quit.  once logging in after i find that im at lvl 6 a cleared inventory, yet all the things i did before were still there and all the ores i mined were still smelted.  id like an explanation.  this is the seventh time this has happened.  fix your game.