Hacking SAV file dates are not updating

[Rascal]

I'm a long time CycloDS user that recently purchased a A2Ki for my DSi. I'm noticing that when i play games on the A2Ki that the "modified" date for the SAV files is not changing. Is this normal? For reference, I am using latest AKAIO. The reason I ask is that I used to "know" which SAV files I needed to periodically restore to my retail carts by the SAV file's dates.

Thanks in advance.