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The processes may be forks. Java does this too. Try pushing F5 and see if that cleans things up.

On tree view (F5), you can collapse and expand sub-trees (with "+" and "-", or just click twice on them).

Those might be threads. It's best to disable showing threads (F2 - Display options - Hide kernel/userland threads) because they give little information over just the process.

Thank you so much.