You right. I clicked again on arcane symbol, it disappear again, and in inventory appear both arcane symbol lvl 13 and arcane symbol lvl 1.
When I clicked on Arcane symbol lvl 13 - it update table to lvl 13 and enhance option. After enhance, level …
OK, just did full shutdown, following link's instructions (written for dummies like me).
Now just waiting for maintanance end to check out. Thanks in advance, AKradian.