ps aux | grep rsync lists four/multiple instances

While backintime is running, when I list the rsync processes with "ps aux | grep rsync" it seems that there are multiple instances of rsync are running. Do other users observe the same behavior and is this fine? :-) Thank you.

Below is the output of "ps aux | grep rsync" (parts where contents were omitted are marked with [...]).

root 2829 0.0 0.0 4096 612 ? S 18:31 0:00 sh -c rsync -aEAX -i --dry-run --chmod=Fa-w,D+w --whole-file --delete --exclude="/media/[...]" --exclude="/root/.local/share/backintime" --include="/etc/" --include="/home/[...]/" --include="/home/" --include="/etc/**" --include="/home/[...]/**" --exclude="*" / "/media/[...]/backintime/20100902-193412/backup/"
root 2830 5.9 0.6 128444 24932 ? S 18:31 0:17 rsync -aEAX -i --dry-run --chmod=Fa-w,D+w --whole-file --delete --exclude=/media/[...] --exclude=/root/.local/share/backintime --include=/etc/ --include=/home/[...]/ --include=/home/ --include=/etc/** --include=/home/[...]/** --exclude=* / /media/[...]/backintime/20100902-193412/backup/
root 2831 5.2 0.4 84740 16700 ? D 18:31 0:15 rsync -aEAX -i --dry-run --chmod=Fa-w,D+w --whole-file --delete --exclude=/media/[...] --exclude=/root/.local/share/backintime --include=/etc/ --include=/home/[...]/ --include=/home/ --include=/etc/** --include=/home/[...]/** --exclude=* / /media/[...]/backintime/20100902-193412/backup/
root 2832 0.9 0.5 126436 23648 ? S 18:31 0:02 rsync -aEAX -i --dry-run --chmod=Fa-w,D+w --whole-file --delete --exclude=/media/[...] --exclude=/root/.local/share/backintime --include=/etc/ --include=/home/[...]/ --include=/home/ --include=/etc/** --include=/home/[...]/** --exclude=* / /media/[...]/backintime/20100902-193412/backup/
[...] 2869 0.0 0.0 7636 1028 pts/0 S+ 18:35 0:00 grep --color=auto rsync