Sorry if this has been discussed before but on the FAQS on the app about how many times you can vote the answer says there is no limit on how many times you can vote but the eligibility of each vote is at the sole discretion of channel 5, does this essentially mean they can nullify any vote they like for any Reason they see fit.

Can Anyone shed any light on this sorry for bumping but I'm curious

Technically speaking yes. But there's no chance they would do it.

It's probably there just to cover themselves in case anything happens, like maybe, fixing or something, somehow.