I made a bug report in which I referenced this post because explaining it in a single bug report is rather difficult
When a craft is uploaded to the website, the dimensions that are shown (5mx2mx2m) are the ones of the previous loaded craft. This bug is not really noticeable because usually the previous loaded craft is the one that is currently loaded as well (e.g. when you return from a game), but it did affect several crafts that I used to determine the scale of the ingame units, so now my Delta IV and Ariane 5 are completely out of scale :'C
Example crafts:
CRAFT 1 - shows it is 9m x 2m x 2m while in reality the tank is 5m high
CRAFT 2 - shows 5m x 2m x 2m because it loaded CRAFT 1's dimensions, while this craft itself is 50m high
CRAFT 3 - exact reupload of CRAFT 2, now showing correctly 50m x 2m x 2m
You can post it here so the dev guys can notice your bug report