Question about section seating @ LA Coliseum (117 vs. 118A)

Hey y’all, some of my friends bought section 118A and I bought section 117 for me and my bf.

I was wondering if anyone knew how security worked between sections on the SAME level (etc. moving from 117 to 118A), because I saw that 118A was $20 more expensive per ticket, so would they stop me and my bf from moving over to that section?

Just confused because the LA Coliseum website says it’s GA seating (free for all), but certain sections on the same level have different prices?

I understand if the prices change by level (300s vs. 200s vs. 100s), but why does 118A cost more than 117 if they’re right next to each other, and how would security differentiate between the two ticket holders? Couldn’t someone buy a cheaper 300 level or 117 section ticket and move to the more expensive 118-123 sections?