Win 7, Java version 8 update 45.

My servers world is broken. info in pictures.

server properties:
#Minecraft server properties
#Mon Jul 20 19:29:41 FET 2015
spawn-protection=16
max-tick-time=60000
generator-settings=
force-gamemode=false
allow-nether=true
gamemode=0
broadcast-console-to-ops=true
enable-query=false
player-idle-timeout=0
difficulty=1
spawn-monsters=false
op-permission-level=4
resource-pack-hash=
announce-player-achievements=true
pvp=true
snooper-enabled=true
level-type=DEFAULT
hardcore=false
enable-command-block=false
max-players=5
network-compression-threshold=256
max-world-size=29999984
server-port=25565
server-ip=25.152.244.8
spawn-npcs=true
allow-flight=false
level-name=world
view-distance=10
resource-pack=
spawn-animals=true
white-list=false
generate-structures=true
online-mode=true
max-build-height=256
level-seed=123456789123456798
enable-rcon=false
motd=BipBapBop