Hi Michael sorry to read your story and hear of your addiction and struggles, in terms of the casinos in question they are visually similar but they are, separate owners, with Jackpota operating almost like what I would call a "white label" that looks similar in terms of style and design and games of Mcluck but that is where the similarities end, so there would not be a blanket ban across both sites.
So in this regard being banned at McLuck and being flagged in their system as a problem gambler is not info that would be freely shared with Jackpota.
It is not an ideal situation and I wish there was a cover-all solution for every method of gambling but there simply isn't a fully effective "problem gamer" system in place to cover every method and device.
Things like Gamban may get there eventually but aren't effective enough right now still.