Double tabs opening up in chrome with a single click?

Recently I've noticed at times (like about 30% of the time), when clicking on a link to a new page to open up in a new tab, chrome opens up 2 of the same page in two tabs rather than just one single page. It doesn't seem like a virus, since everything is running okay on my computer...could it be that my mouse is outdated? I'm not really sure.

Anyways thanks TSG for being such a help always. :)

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: Intel(R) Core(TM) i3 CPU 540 @ 3.07GHz, Intel64 Family 6 Model 37 Stepping 2
Processor Count: 4
RAM: 5943 Mb
Graphics Card: Intel(R) HD Graphics, -1348 Mb
Hard Drives: C: Total - 705244 MB, Free - 622156 MB;
Motherboard: Dell Inc., 0C2KJT
Antivirus: McAfee Anti-Virus and Anti-Spyware, Updated and Enabled