See the different standards: http://forum.mikrotik.com/t/poe-port-red-on-switch-with-connected-wap/144028/1
But also daisy chaining might be limited: “For best PoE output functionality, please use the power jack to power the CSS unit.”
I was also surprised that a hAP ac Lite powered with PoE by a MQS (from USB) could not power the mAP Lite at its PoE out port. Plugging the power supply in the hAP Lite worked for the mAP Lite.