This problem is related to a memory management issue, introduced in the initial release of Version 10. This was reported and fixed in Service Pack 1 to Version 10.

The current Service Pack is Service Pack 2. Please download Service Pack 2 from Smart Support, install it, and rerun dynamic analysis for this job. The animation will then behave as you expect.

(NOTE: When you start CAESAR II, the "Newsreel" will be on the left-hand side of the Main Menu. The top item here tells you what the latest version and service pack of the software is. You should always check this to ensure you're running the latest edition.)