I went out on server.jar and noticed that when I placed a oakwood door in a cave, the second was not rightly placed, so I took my wooden axe and choppe...d huh? One strike and the door disappeared. I did that again and, yes, the door was gone with one strike. I placed a new door (I made 3) and opened it, then the top half disappeared... So, on to the next problem....

The log file created by the server.jar.....

Well, I shut down the server and restarted it after I could not find in the log what I noticed on the logscreen, spamming errors all over the place, and I went into the game again and this time I had 3 doors in my inventory again, and placing hem would work nice, opening/closing too, but when I looked in the shaft I had dug out, wooden pickaxe=60 blocks stone and then it is gone, I had 3 pickaxes and all three were gone (used up) but not on the third lane of the corridor

The stones I broke, were in my posession, so weird huh?