I was just curious as to how the OP fixed this issue as I was seeing the same behavior on my end as well. Thank you for your link to the udb forum. I hadn't as of yet registered with them as I've only had MaNGOS running a couple of days. It indeed turned out to be a database issue. Credit goes to bajaexplorer for the coordinates Antiroot for the rotation hint. Thank you very much.
Here was the fix I applied:
UPDATE `gameobject` SET `position_x`=-45.4007,`position_y`=2472.93,`position_z`=6.9886,`orientation`=1.5708,`rotation0`=0,`rotation1`=0,`rotation2`=0,`rotation3`=0 WHERE `guid`=18802;
UPDATE `gameobject` SET `position_x`=-45.4005,`position_y`=2492.79,`position_z`=6.9886,`orientation`=1.5708,`rotation0`=0,`rotation1`=0,`rotation2`=0,`rotation3`=0 WHERE `guid`=18803;
UPDATE `gameobject` SET `position_x`=4.52807,`position_y`=8.43529,`position_z`=7.01107,`orientation`=1.5708,`rotation0`=0,`rotation1`=0,`rotation2`=0,`rotation3`=0 WHERE `guid`=18804;
UPDATE `gameobject` SET `position_x`=4.58065,`position_y`=-11.3475,`position_z`=7.01107,`orientation`=1.5708,`rotation0`=0,`rotation1`=0,`rotation2`=0,`rotation3`=0 WHERE `guid`=18805;
UPDATE `gameobject` SET `position_x`=4.49883,`position_y`=28.2097,`position_z`=7.01107,`orientation`=-1.5708,`rotation0`=0,`rotation1`=0,`rotation2`=0,`rotation3`=0 WHERE `guid`=18806;
UPDATE `gameobject` SET `position_x`=-45.3934,`position_y`=2512.8,`position_z`=6.9886,`orientation`=1.5708,`rotation0`=0,`rotation1`=0,`rotation2`=0,`rotation3`=0 WHERE `guid`=18807;