Size of robot during competition

My kids robot sits currently at 18" front to back, Now when they go to the blue dispenser they have an arm that extends out forward, well beyond 19", and activates the dispenser. It was my understanding that they could exceed that 19" mark in order to activate said dispenser. Please tell me I am correct. Thank You

This is not correct. The robot can only exceed the 11 x 19 footprint when in the expansion zone (endgame).

It also must begin the match under 15" tall, but can expand after the match begins anywhere on the field.

Please consult the rules manual for <G5> and <G13>