This is a list of continuity errors, or events in certain episodes, that contradict what happened in other episodes.
In "Get the Message", Lori told Lincoln to never call on her phone, but in "Cover Girls", he called her when he had trouble, and she had nothing against it (though she probably did not have a problem since it is an emergency).
However it's possible that she was just doing it to help her siblings.
In "Linc or Swim", on every community pool, the siblings needed to get dressed, but after the third time, they all were walking in their swimsuits on the street, and nobody was carrying their regular outfits.
Lincoln separated from his sisters to go to the shop, but he was in his regular outfit, despite he didn't carry it.
In "Undie Pressure", Lola pleads with her sisters to be accepting of each others different hobbies, when it's revealed that she bought Lincoln the new underwear, despite him losing the bet, and they all agree. However, in "Sleuth or Consequences", they all laugh at Lincoln's makeshift Ace Savvy costume, and are really smug about the Princess Pony, which contradicts how they agreed to be accepting of each other's differences.
Though, they may have only accepted him reading comic books in his underwear.
In "Come Sale Away", Lori wears earrings in an old photo. In "Homespun", she said she received them from Bobby, but in "Undie Pressure", it's revealed they have only been dating for a few months, so she couldn't have owned those earrings a few years ago, before she met Bobby.
In "Homespun", it's said that the walls are very thin, which contradicts "A Tattler's Tale", because if that is the case, Lola could have just listened in from outside the room, and wouldn't have needed a hidden microphone.
In "The Old and the Restless", Albert was living in a retirement home, but in "Cover Girls", he was living in his own house. It is possible that between that episode and this one, he was interned there.
In "No Such Luck", Lisa is superstitious, and believes Lincoln brings bad luck, but in "Raw Deal", she was clear that she doesn't believe in superstitions.
In "No Such Luck", Rita and Lynn Sr. kicked Lincoln out the house despite that in "Ties That Bind", they said they would never kick out any of their children.
In "Patching Things Up", Lola got sick easily due to having to use worms as bait while fishing, but in "Raw Deal", Lola had no problem fishing while using worms as bait.
In "The Whole Picture", Lynn Sr. says they don't have the cloud on their computer, but in "Study Muffin", Lisa says they do and that she stashed more photos of Hugh in it. Although, there's the possibility that "The Whole Picture" took place before "Study Muffin".
In "Shell Shock", Ronnie Anne and Lincoln are in the same class but in previous episodes, they weren't.
In "Fed Up", Lynn Sr. cooked alone, but in "Making the Grade", he claimed he needs Lisa's assistance in cooking, and in "A Tale of Two Tables", there was a kiddie table, but in this episode, they all sit at the same table.
That was because in "Making the Grade", the recipe he cooked had the measurements in metric which Lisa could read.
It is possible that her parents took the actual one away, because it was too dangerous.
In "Fool's Paradise", Leni gets the "Nose Goes" method of touching your nose to indicate you don't want to do something wrong, despite getting it right before in "Suite and Sour" and later in "Potty Mouth".
In "Health Kicked", Lynn Sr. and Rita are shown to be lazy at the beginning, despite having been shown to enjoy exercising in "The Loudest Yard" (which is ironic, because in the latter episode, Lincoln was the one who was being lazy, and Rita was trying to get him to exercise).
In "Garage Banned", Lori said Lisa already took Lincoln's appendix, what would leave a scar on his stomach. In "Job Insecurity", there is no scar on Lincoln's stomach.
This is because "Job Insecurity" was produced before "Garage Banned".