Tabula Rasa+Artisan Bench+Jeweller's Orbs interaction

Tabula Rasa can be de-socketed in Artisan Bench to 2-4 sockets, but, if you use Jeweller's Orb on it, sockets will not be 6L again.
Example: 2L+1J = 4S(2white, 2random colour), 3L+1J = 3L(2white, 1other) and waste of orb.
3L in Artisan Bench to 4L attempt = Item has fixed sockets.
3L in Artisan Bench to 2L attempt = success. But after that, you cannot do 4L again in Artisan, you need to use Jeweller's Orb on it manually, resulting in 4L again.
http://imgur.com/a/W9FV3