TM-F3/5 file list

[ou toppie]

I have 26 recorded programs on an external hdd and I noticed last night that the program I had recorded earlier in the evening had appeared on the file list at number 18, in the middle of previous recordings, instead of at the beginning of the list as it normally does.
Has anyone any suggestions as to why this would have happened and also is there anyway to edit the file list as to the order the recorded programs appear on the file list.
Thank you
OT