Hi
If you have a gap in the timeline from whatever reason...,,clip deletion or placing a clip at the cursor etc. All you need for is to do is to zoom to enlarge the gap so you can right click it easily without the cursor getting in the way and then choosing "Close gap in the Track" from the menu. This will delete the gap and reassemble the track. If you feel this isn't working correctly switch into Storyboard mode. Any gaps in the main track will show up as empty "slides" with an arrow depicting the gap and its duration. (you can now see even very small gaps). Right click the blank "slides" and select "Close Gap" Note :This only works on the main track.
If you have several tracks and want to keep an upper track in position relative to the main track and you want to close a gap in the main track without losing the upper track's position. Use "Close gap in Sequence" instead of "Close gap in Track" This will close the gap in the main track and shift that track as well as the overlay tracks along. The actual position of the gap relative to the overlay track may be important here so you may have to give it a try and see.
If you have a gap that is too small to fit the new clip just use Sequence Preview and use the II< control to shift the cursor line to the clip edge at the start of the gap. Now select the new clip in the clip bin and use the down arrow to the right of the Place tab to select "Place on sequence at the Cursor" The clip will now be inserted in the gap and the clip/s to right will be shoved along. The gap will also remain after the new clip so remove it now as outlined above. (Probably with "Close Gap in Sequence" if there are overlays.)
Nat