When it tries find the rift, sometimes I will be standing right next to it and it will run to a random spot on the minimap, and often run back and forth several times before it goes back to the rift and begins to convert memories. I don't think that this has to do with the color I have set for the rift. It still clicks in the general area that the rift is supposed to be at (on the minimap) correctly, but then it just clicks elsewhere on the minimap and runs around. After it runs around a bit it eventually finds the rift and converts memories.
I'm using the script at the lv90 desert spot. It will be at the rift, then run all the way down to the southeast corner of the map, then back up, and repeat this several times. Here is a picture.
http://puu.sh/65aEL.jpg