I made two purchases at Newegg, one day apart. Identical items, okay?

The second one was, like... 10% more. Whyyyyy?

(I'm getting a refund of the difference.)

We can't seem to make a purchase at Newegg without our credit card company questioning whether it's fraud.

Maybe call your CC proactively to discuss parameters? I have to make arrangements with my credit union if I make international purchases, or I get the same issue.