The load I went to pick up had a single 28' foot trailer with one tank weighing 22500 pounds at about $24 per mile as the default. Like these.
When I got there, I clicked the little trailer selection cog at the bottom hoping to grab a double, thinking it would pay me double. Which it usually does. And sure enough it offered me a double, but it still said 22500 pounds for $24 per mile, like the bottom one here.
Either the company only wants one tank, which means it shouldn't even offer a double, or it's trying to get me to haul an extra one for free lol. At the very least it should still say 45000 pounds like the top one. I wouldn't want to fail inspection at the next weigh station haha.
Both of those doubles were the default offer BTW.