Logical Sorting by character or digits topic

Dear MxPlayer developers,
This is by far the most friendly and advanced media player for android I've seen, you are doing amazing job.
but i have already report on a specific issue, but didn't get any feedback:
I have a folder with multiple video files with index names,
Example:
#1 Video_1
#2 Video_2
#3 Video_3 . . . . .
. . . .
#10 Video_10
#11 Video_11 . . . .etc

When i sort by name, the application sorting in wrong order by character:
#1 Video_1
#10 Video_10
#11 Video_11
#2 Video_2
#3 Video_3 . . . etc

And this is very annoying cause all the playlist is messed up and the videos doesn't play in the correct order and i need to look each next file.
in addition i need to rename all the videos in folder with indices until 9 digit. example below:
.a_1,a_2,a_3,.....a_9,b_1,b_2,....b_9,c_1,c_2,.... .etc

I will very appreciate it if you will fix the issue
thanks in advance