DD2 is 11mo been crawling for the past few weeks, but it is the crab like crawling, with one leg looking like she is about to stand up, and the other knee doing standard crawling!. She is very speedy and seems to be happy with it. A colleague implied that i should be concerned as she wasn't crawling 'normally' - should i be? It doesnt mean her walking will necessarily be late or anything, does it?