Jones has sat down with Hartley to remind him of his responsibilities, as a player and as a leader.
"We've had many chats and no one is more disappointed than he is," said Jones. "He is a proud Northampton player and he wants to captain England. That's the first mistake he has made for us. Dylan made a judgment error.
"He went to hit the bloke hard, he wanted to stop the ball, the player's height changed and he had a loose arm. I see that as his first mistake, so there is no reason why that changes anything."
Hartley's leadership qualities have been intrinsic to England's success under Jones with 13 wins in 13 matches.
If they are to a mount a serious challenge for back-to-back Grand Slams then Hartley's presence is important, all the more so with vice-captain Billy Vunipola ruled out for most of the championship with a knee injury and another strong character, former captain Robshaw, a serious doubt.
There are still three more weekends of competitive action, two of them in Europe, before England go into camp and even though Jones put a stoical face on the mounting injury problems, declaring that it is "an opportunity to grow our depth", he also acknowledged that he had no option but to keep pressing forward with fingers crossed.
"You wake up every day and hope someone else doesn't get injured," said Jones, who is awaiting scans on Robshaw's shoulder, as well as Manu Tuilagi's knee, and is giving serious consideration to switching Maro Itoje to the back row, although that option will be shaped by the injury situation at lock.
"Maro at six is something we will definitely look at," said Jones. "He has a pretty good engine on him, is reasonably athletic and is a good one-on-one tackler, which is essential at No 6."
The upbeat news for Jones is that Wasps back-row forward James Haskell is on the brink of a return after six months on the sidelines following foot surgery.
Top of the agenda in Brighton was addressing the need for England to avoid the downward spiral of form that has afflicted Premier League football champions Leicester City.
"In 2016, the two most winning teams in the country were Leicester City and England," said Jones. "We went through the example of what's happened to Leicester and do we want that to happen to us and what are the things that we need to ensure that it doesn't happen.
"We've come up with some strategies that we believe will help us overcome any complacency. It is about having courage as well to play your game really well."
