Goal with certain string doesn't work (no replies)

I defined several goals to check the usage of certain site collectiosn. These goals are all built very similar.

1. Goal name: varies, of course
2. "Goal is triggered" -> "when visitors" -> "Visit a given URL (page or group of pages)"
3. "where the URL" -> "contains" -> "Record/XY"

There's only a difference in XY, see also my screenshots.

XY = Record/NL works: [attachment 1371 goal_works.png]
XY = Record/DO doesn't work: [attachment 1372 goal_does_not_work.png]

All pages with /DOAJ are not tracked. Pages with ="DOAJ" or tracked, at least sometimes. I have no explanation.

I use PIWIK 1.12 with javascript embed.

PS: I already asked in German subforum, but got no answer.