Error when export channels?

Something really weird with renoise I came on today, is that I got a time diffrence when I export

my “old” but updated kickdrum, compared to when I first exported the mixdown channels.

I have never been up to this kind of error and I still do exaclty the same settings on the channel export,

as last time and no bpm etc has been changed.

Have somebody any idea wy it is like this?

I always mixdown my track in FL Studio.