Wrong post numbering in space stream

[Gilbertdelyon]

How to reproduce:
Create a space with cfile module enabled
Add some files. They create posts in space stream
Open stream

Only 2 posts are displayed (could be more),
Click "Add 11 more files"
Now the page will display 6 posts in total. The button "Add 7 more files" appears.
Click "Add 7 more files"
Now the page will display 10 posts in total. The button "Add 3 more files" appears.
Click "Add 3 more files"
Now the page will display 13 posts in total.

[Gilbertdelyon]

Please also notice this setting in admin / settings /appearance

It doesn't seem to work for posts linked to files