I found it annoying that my Canon HG21 with 00000.mts designate the files always ascending. During import into video editing software then missing the assignment of date and time. Disturbing is synonymous that backups get to SD Card other numbers if you do not fully secures all files.
As a remedy, I created a small program that reads the time code from MTS/M2TS-Dateien and accordingly rename the file name.
I tried it with various cameras, so far without problems; (; However, use at your own risk)
How it works: In "Add MTS ..." Directories, add the AVCHD 's included (And these will appear under MTS Folders)
"File-Renaming ..." switches the filename renaming