[mkgmap-dev] Meaning of some mkgmap output messages

Hello all I receive two types of messages when compiling some maps which I don't know how to interpret and if I should take any action to avoid them. First is of the form "(Area): 31177007.o5m: Area.split 1669081 4757504 1670337 4759552 res 11 can't 2 1" which is produced for tile 31177007: 1548288,4409344 to 1673216,4911104 from split file. In some cases the end is "1 2" instead of "2 1". The other one is of the form "Tile selection (0x4a) polygon for tile 25171101 cannot be written in level 0 resolution 20, using 18 instead" and is produced for tile with bounding box 1753088,-8343552 to 3555328,-5726208 from split file.