Whoopsy, I meant I can repair the armour, not can't. Sorry, if I added to the confusion. By skills plate, I meant the window where you choose skills. According to that, I can repair items up to level 5, and if I put another point into it, I should be able to repair up level 10 items, but it doesn't work for me.

Here are the items:

Turtle's Two handed Sword of Surprize - lvl 3 - Dur 1/41
Leather Armor - level 2 - 6/11
Rat's Leather Leggings of Surprize - lvl 2 - 20/23