In .IMPORT command in Mload we have a option to give record no. from which processing should begin. i.e. FROM m m is a logical record number, as an integer, of the record in the identified data source where processing is to begin. You can mention m as 2 and processing will start from second record.
THRU k and FOR n are two options in the same Mload command, functions same towards the end of the processing.
Adding to the above, if from n"start record" and for n "stop record" are not mentioned, mload considers records from start till the end of the file.