Keyframing photon intensity issue (known?)

[THExDUKE]

Hey all.

Ive just encountered an issue which drives me a bit crazy and I have no clue! I have a scene with two lightboxes. In these lightboxes are several arealights. When keyframing the photon intensity ive realized that it does not do that properly. For instance i have a key on frame 1 with a value of 1 for the intensity. On frame 50 for instance there is another key with value 1 and raises after another frame to 6000. If i go back on frame one everything is fine. If i disselect the light, reselct it the value in frame one changed to 6000 ! This happens for every single light. It seems that it only keeps the last value.
And no matter what the value is displayed, the last value is the one which is rendered. Anyone got an idea? The GraphEditor shows me the correct keyed values...even for frame one, but it somehow does not take the settings properly!!
Thx in advance!