Bug in 14w27b: Repeaters, by default, seem to be on four ticks. Every right click seems to make the texture show one tick less. As if it is going backwards. However, in the f3 debug menu, it shows a repeater with a four tick texture as having 1 tick delay and a 3 tick texture as having a 2 tick delay. There is something wrong with the block models.

See the top right of the screen in the screenshots coupled with the repeater model.