Provided all sources - video and audio - were sync-locked when recorded they should stay that way once synchronized at the start in VP.
You might lay down the audio track and lock it (lock symbol at the left), then add video tracks in sync as editing progresses.
As for cutting between video tracks, remember that higher numbered (overlay) tracks take precedence over lower tracks. Thus, if a portion of track two is split out and deleted, then track one will be seen in that gap.
In the latest version you may find some helpful effects shortcuts under the OPTIONS|SHORTCUTS tab.