Log block might have a record of blocks placed, but any world editing done will have to be redone manually. Lb doesn't record that.
Select the entire affected area with the wand
/lb rollback sel time 3d
Tells log block to roll back any changes made in the last few days (it's a trick, the blocks are already gone)
/lb redo sel time 3d
Tells log block to put the blocks back. So it will place the blocks that it "thinks" it removed.
Change 3d to whatever amount of time you think, just make sure you use the 'sel' parameter or I'll ban you myself
