Hello,
A long long time ago, repeatable quests were the one at the little dragon, near the portal (
this one and
this one, but not sure).
They were usefull to get all signs of the choosen, after some several days.
So i think that if there's one sign missing, it's a quest somewhere before this little dragon, as those 2 quests now give exactly the numbers of signs you need to get to 14.
If you played 2 or three years ago, there was a boring quest that needed a leathercrafter or alchmist to be completed, do you remember this quest ?
It's this quest :
http://en.allodswiki.ru/quest/1294742614 (or league side).
Maybe you let this quest aside as it was not easy to finish it ? Now it's much more easier, just click auto-move and you can complete it.
As you are saying you checked on
database, maybe the real problem is that it's an old char :/.
How hard is the repeatable quest ? What's your level ?
EDIT : Oh this one gives 2 signs:
http://en.allodswiki.ru/quest/1134033419
Can't remember if it was a repeatable quest.
Will check if i have a screenshot.