Star-Telegram front page: computer "glitch" -- election

[antigop]

http://www.dfw.com/mld/dfw/news/14051304.htm

>>
An undetected computer glitch in Tarrant County led to inflated election returns in Tuesday’s primaries but did not alter the outcome of any local race, elections and county officials said Wednesday.
The error caused Tarrant County to report as many as 100,000 votes in both primaries that never were cast, dropping the local turnout from a possible record high of about 158,103 voters to about 58,000.
>>

So, uh, how do they know that the "glitch" didn't alter the outcome of any local race?

[reality based]

1. You vill trust und you vill like it!

[ret5hd]

2. Quote: The problem stemmed from a programming error by Hart InterCivic...

which manufactured the equipment and wrote the software for the local voting system.
end quote

so, this is supposed to allay our fears how?