Revaluation is not based on any particular journals, subledgers or manual. It is simply based on balances.
Oracle keeps track of balances entered in foreign currency and entered in local currency separately.
Also Oracle keeps track of how much foreign currency balances are revalued already (beq columns of gl_balances tables). This is how revaluation works. It will not discriminite based on where the journals came from. Also your argument that the dec-13 period is closed, therefore those journals should not be picked up for revalution is not valid. As explained, revalution is based on balances. It reads YTD balances for balances sheet accounts and you can control which balances should be read for income statement accounts (PTD/YTD) through profile options. Hope that helps.