Do you have to play a (replaced) joker immediately with 2 tiles from your hand?
According to the official rules, your house rule (which I also used to play) IS currently official:


  Once a player replaces a joker, they must use it in the same turn as part of a set.


Although it specifically contradicts your other house rule about manipulating sets containing  a Joker:


  Sets containing jokers can be split and manipulated like regular sets.


FWIW, I used to play that Jokers didn't have to be replayed in NEW sets, but could alternatively be played in existing sets (e.g. I replace a Joker, and then add it to a 6-7-8 run as a 5 to allow me to play a 4). I infer from your question that your house rules require Jokers be replayed into new sets, but I may be misunderstanding your explanation.

Source: http://www.rummikub.com/info/Rules.aspx