Heroes EP19-20 Explained

Two possible theories:

1) MULTIPLE TIMELINES

PRO: Totally PARADOX FREE
CON: Hiro's power is limited by the fact that he CAN'T create paradoxes (Proof in Six Month Ago and EP 20), this limitation in a multiple timelines universe is pretty stupid lol



2) SINGLE MUTABLE TIMELINE

PRO: Again: Hiro's power is limited by the fact that he CAN'T create paradoxes (Proof in Six Month Ago and EP 20), this limitation in a multiple timelines universe is pretty stupid lol
CON: the "law of conservation of energy" is not respected here, 2 Hiros can't be at same space and time, but still we have saw them NEAR only in the future or could be a mistake/choice by writers


I did this because alot of friends are confused about Heroes recents Time Travels/Universes/Timelines.
Keep in mind that this is JUST MY OPINION