when something doesn't add up

I am new and my gut doesn't trust these new rules that red pill tells.

So... A girl. Flirts, talks and adds me in social media. So after few days I give it a try and texts her only "hi". Nothing. Next day when we bump into eachother she appologises that she couldn't answer me cause her laptop keyboard didin't work. So far my response was laughter and told her she should buy new laptop.

But now I have doubts. I read that if something doesnt add up when woman explains something it probably wont and its a red flag. She have smartphone with internet to add me but gives lame excuse about laptop. Hmm...