It will not (mine stayed the same after several updates). But I've read from several forums that your ranking will be pushed down.
<blockquote>Person A makes an EOI for a particular occupational code. Person B, a day later, makes the EOI for the same occupational code.
Now suppose that both have 65 points.
What would happen?
Skill Select is a point based system.
In case of a points-tie, the person to make the first EOI gets the preference. So in our example Person A gets the preference.
But what exactly is taken into account here is the time you submitted your EOI or the time at which you make an update to your EOI causing your points score or visa eligibility to change - whichever is later.
Now suppose Person C has filed his EOI on 1st July with 60 points and Person D files on 2nd July with 70 points.
Few days later, Person C receives a higher IELTS score (may be through EOR) and updates the EOI to have 70 points.
Now that both of them have the same point score, who will have the ranking preference?
You guessed it, it's D - because C's last updated time (causing points score or visa eligibility to change) is after D's.</blockquote>