To insert the clips at the current slider position, use the "Insert into Timeline" feature instead of "Add to Timeline" from the Edit menu.
Inserting into the Timeline will also move clips in all tracks by the duration of the clip being inserted. To avoid this, lock all other tracks by clicking the Lock option on the timeline.
After adding or inserting a clip into the timeline, you can move the clip to any position in the timeline by dragging it to that position. You can also cut/copy and paste the clip using the timeline.
For more about editing clips using Video Edit Magic's timeline, refer to the following article:
http://deskshare.com/Resources/articles/vem_EditingTechniques_removeunnecessaryfootage.aspx
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