Update bug

When updating a cue after a cue with a effect in it, the cue doesn't update but goes to the effect. What am I doeing wrong? When I merge the next cue the cue is going to the new values. Example:
Cue 1: spot 1 through 12 with an intensity effect.
Cue 2: spot 1 through 12 @45%
Then when updating cue 2 to 50% the value of the effect is being recorded.
Does someone have a clue? Thanks Xavier