I already answered your other thread and for your convenience and for others who might have the same question, I pasted my reply below:
Straight to your questions:
1) By design the RadWindow always closes with Fade animation because this is the most suitable animation for that and there are unclear setups and inconsistency problems with others, e.g with FlyIn. However, I find your request reasonable and I prepared a sample demo for you on how to achieve that - you can find it attached. Since I developed this custom solution which could be helpful for others, too, I prepared a KB article resource which you could also examine:
2) I could not reproduce the problem with starting from the center of the screen - do you reproduce it with the demo page I attached? If not, please provide more details on how to observe the problem on my side and I will check it out.
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