I’m still confused.. what did she vote against and when?

I am very likely misinformed on this - but I thought this funding was part of the Omnibus bill that passed the senate in December that Collins did in fact vote for. If I am wrong about this and she actually did vote against it I will most definitely be writing her an email asking for an explanation - but wanted to make sure I understood things a little better before doing so. However, I would not be surprised in the slightest if this is in fact true...