i know this post is 2 yrs old. But the problem happened to me also only days ago.
I Isolved it within Windows 7.
Go to System-Control -> Region and Language ->format -> advanced Settings
"decimal delimiter" -> from "," to "." (point)
"symbol for counting signs" from "," to " " (space)
after that the .csv gets imported correct and you can sort it by using "data to rows" with "," as delimiter.
Kind Regards