minus and plus effects and and permenants that change status.

[TheRogue]

In a tournament today some one was trying to use jittes -1/-1 effects to kill a mishra factory already turned into a creature. with the two -1/-1 effects stacking on the factory the factories controller argued that he could replay the ability to make factory into 2/2 again to restore the factory after the effects of the first -1/-1 effects in an attempt to save it. Does mishra's factory retain -1/-1 regardless if its a creature or not?

even if its not just that situation what is -x/-x or +x/+x effects in relation ship to a permanent if its types are changed some how?
do they function like a point system in a similar fashion to damage or counters?

[Anusien]

It used to work that way but no longer.  Now, you apply all P/T setting effects in timestamp order, then you apply +1/+1 and -1/-1 effects.  So Factory will be a 0/0 no matter how many times they animate it.