That is the intent.^^
It did yes.
Although if you look at my design suggestions, in the talent section(the T.N.T.-talent)
#[Suggestions updated] Pre-Legion/Ranged Survival
That talent is designed for you to want to do some “clipping” with Explosive Shot, in order to increase the max duration of it. As it gives you extra uptime, and free damage.
I haven’t specified how much you should be able to extend ES with that mechanic, but I would say up to a max of 9 seconds or so, when you do it manually. And if you also get a proc on the Exotic Munitions-passive effect, it could be extended above the 9second mark.
Manually, you shouldn’t be able to keep ES up permanently on a single target. But with some luck on LnL-procs or Exotic Munitions, you could keep it up for quite some time.
Maybe even on two targets for cleave damage. Although, that’d require you to reach rng-heaven in terms of procs^^
This is also a reason for why I did some changes to my suggestion for LnL as a passive effect.
So that if you’re lucky with getting LnL-procs, it would make you capable of “carrying” more than 2 charges max of Explosive Shot. For a limited duration ofc. Due to the nature of LnL.