Yea regarding multiple simultaneous subs, I think the common rule is that what you're "supposed" to read is below while the "background conversation" is above. Whenever it happens, I activate my JRPG dialogue reading eyes and super skim through the texts π« it works fine, but I've kinda noticed that you barely ever hear anything too interesting in the "background conversations", so you're fine with just reading the subs below in those moments