Yeah, we experienced that in Kartris v1.3x, and will be fixed in the next release.
Follow the below steps to have it fixed:
1. Go to {Kartris_Folder}\UserControls\Skin\CategoryMenuAccordion.ascx.vb
2. In line# 67 replace this:
For numSubCounter As Integer = 0 To nodSiteMap.ChildNodes.Count - 1
By this:
For numSubCounter As Integer = nodSiteMap.ChildNodes.Count - 1 To 0 Step -1
Then save the file and here you go.