Read what Primedomain wrote, then look up the bug tracker, which personally I'm staying away from it for several days ... so I don't completely lose it closing what will no doubt be dozens of reports of old, already fixed bugs which people where too 'lazy' to read through before posting new ones
A bug existed whereby someone editing/deleting an option in one poll would result in the same option number being removed from all polls. This has been fixed in 2.0.1 ... confirm
the problem still exists in 2.0.1 before
reporting anything (think of it as helping my blood pressure stay low).