Adding more LEDs in the strip causes white to become red-ish
The data sheet does not tell the current, usually full white can mean 60mA per LED.
For 62 LED you're getting close to 4A.  Good thing your power supply can do 10A.
Since the whole strip colors, there seems to be low enough resistance inside the strip, but I'd feed the power to both ends of the strip to be sure regardless.
The limiting factor might be the thickness of your power wires. I'd use AWG 22 or 20 for +5V and GND, separately frome the source to each end, to be on the safe side.