I think, technically, we are both correct, but we are counting the pins on the Micro-USB side differently, which accounts for the difference.
I was using a Micro-USB pinout diagram that counted pin 1 on the left when the plug is held small side down, and my guess is that @mososki was using a pinout diagram that counted pin 1 on the right when the plug is held small side down.
On our CAT5 wiring, 1 and 6 provide power. Pin 6 is the positive and 1 is negative. When the Micro-USB plug is held small side down the 5V positive pin should be the one that is furthest to the left.