List of items in 'tags' fields

I recognized a little strange behavior when putting a comma separated list in a 'tags' field (e.g. interests):

If i put some stuff like 1,2,3,4,5,6,7,8 in a 'tags' field an save it initially, the list will be displayed as 1,2,3,4,5,6,7,8.  Clicking on 'Edit Profile' and saving again will reverse this order to 8,7,6,5,4,3,2,1. Editing and saving the profile again and the order is 1,2,3,4,5,6,7,8 again.

I think that sometimes it will be essential that a list of tags will be displayed exact in the order the tags are entered, and will not be reversed anytime i edit my profile...

Is this a bug or a feature?