No, as bad as it is (and should never happen), a glitch is when a vote is tabulated the wrong way. Usually it’s a swap of each candidate when it happens, but again, it should never happen.
But votes tallied by people who didn’t even vote?
Not a glitch!
A Glitch here, a Glitch there; pretty soon you're talking about "Real Vote Fraud". Quote by Senator Everett Dirksen.