It couldn't be that the room was meant for bottle feeding moms. The room is clearly labeled as a "nursing room". And besides, who expects bottle feeding moms to go to a special room to feed their babies? They can just feed their babies out in the food court where everyone else eats! No, that can't be it.
Maybe the people that made the sign couldn't find a symbol for nursing that is universally recognizable? I mean, the bottle is widely recognized as a symbol of infant feeding. But there's the international breastfeeding symbol, so that couldn't be it!
Maybe the person in charge of the sign knew that children would be walking by and wanted to avoid posting something inappropriate? But nursing is not obscene, and is actually intended for children! That certainly couldn't be the reason for the nonsensical symbol choice.
The only logical conclusion is that it must have been a simple mistake! Yes, that must be it. And if it was a mistake, surely they'd be thankful if someone corrected it?
There, that's better.