Door bottom weather strip hanging off?

[Tango22]

Noticed last night when I got out the car that there is a black rubber/plastic strip (I assume its a weather strip of some sort) right along the bottom edge of the door where it would meet the sill, hanging off at one end. Upon looking at it there appear to be slots in the bottom of the door which it looks like its supposed to clip into. But I can't see how this is supposed to be done? Are there clips missing perhaps or are the sort of oblong bits sticking out of the rubber weather slip which correspond with the narrow oblong shaped holes in the bottom of the door supposed to just push in and stay there? Mine don't appear to want to play ball and do this!!!

Its in this photo, the part with the yellow arrow pointing at it:-