Setting Warm-up time and fixing different gap between cars among start & end of edges in SUMO

Question

I am having two problems regarding setting up warm-up time and gap between waiting vehicles.

1. Is there an option in sumocfg, to extract results from excluding [0,10] seconds, but only [10,327] seconds? I need to set up an warm-up time or change the edges of vehicles. I used end time but did not use begin time option, because it does not match my intention.

    <time> 
        <end value="327"/> 
    </time> 

2. Is there a way to fix this phenomenon, or should I just append edges? It relates to the result of stopping time and queueing_length.

cars waiting cars waiting2

Also, this phenomenon of abbreviated(squashed) status also appears, is this a normal phenomenon? squashed car