No, you're eyes aren't deceiving you. Surface Pro 3 customers are getting an additional August update for their devices today.
Rolling out now over Windows Update, "System Firmware Update – 8/19/2014" is intended to add a couple features and make for smoother boot-ups. Specifically, Surface Pro UEFI (v3.9.150.0)…
- Displays BIOS password
- Displays Asset Tag information
- Improves boot times
The Surface Pro 3 already received a firmware update as part of Microsoft's regularly scheduled Patch Tuesday, just a week ago. In fact, all Surface models received updates except for the Surface 2 series. Read about that here: