How to interpret the output of safecopy

Just as an example, this is one typical output line. > ...........................\(+112394240){X X}\(+209715200) I have gone through the DESCRIPTION OF OUTPUT in safecopy's manpage but I still am not quite sure what exactly it means. For example, if (+112394240) is "the number of blocks (or bytes) [which is it?] continuously read successfully up to this point." and if (+209715200) is the "number of blocks (or bytes) of recent continuous unreadable data.", then how can the latter be larger than the former? Additionally, what is the meaning of {X X}, does it mean that only one block (block 12792709) was unreadable? Any clarification would be greatly appreciated.