Remixes with correct timing started to get popular in mid 2011 and 2012.
Correct Timing Tutorial
This mini-tutorial shows you how to do the correct timing.
Click file, properties or just press Alt+Enter.
Go to Ruler, set the BPM to 140.000 and set the ruler to 16 notes.
NOTE: If you are using a base with different BPM put the base's BPM there, always remember to set the BPM to 140.000 on 140 BPM bases.
Make sure to enable Snapping, Snap To Grid, Snap To Markers and Snap To All Events.
Always make sure to disable Quantize to Frames, leaving this feature enabled will make your Sparta Remixes horrible and unfitting.