multisport activity merge

i started my brick activity in my garmin edge. Finished it and went to run, then calculated the cycling and appeared to be 17 seconds. How can i merge this? honestly, i am sick of this... Tried everything. Fit files won't even take my files!!! why can't i change the cycling part of the garmin multisport for the one i want? now my trainer wants me to do another brick tomorrow? this is rubbish. 

  • Unfortunately most of your text is rather enigmatic and not easily comprehensible, but if you recorded a Run as Cycling using Edge, and got a Multisport activity with two cycling legs, and want to change it, then open the activity in Garmin Connect Web, click the pencil icon top right, and then select the concerned multisport activity leg, and change the type to Run above the title: