Who Me Too'd this topic

According to the following:

http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_note09186a008015c612.shtml#topic5

"Only one destination port is allowed per SPAN session"

however on both 2960 switch running 12.2 and 3560 switch running 15.0 I've managed to create a monitor session with two destination ports which appears to work:

2960-24-TT-L

3560-48PS

Is the documentation incorrect or is there something I should be careful of with the above configurations?