I disagree with you. If the show isn't supposed to have a timeline or connections, then we shouldn't of got Bubble Buddy Returns. The fact isn't that hard to see, why deny it? The writers and the brains behind SpongeBob doesn't care about a timeline or continuity, including Stephen Hillenburg himself. Yes, it's true that SpongeBob never really had a timeline and that's one of it's low points to me. That's gonna hurt the show in the long run, in my opinion. I don't think it was be hindered if it did have a timeline, shows with timelines are the best, in my opinion. And the show is already going through a harmful state, it's already divided the fanbase.
And to the other poster, it's more often in the later seasons. Simply because of it's *major* inconsistencies with the characters themselves. Mhm. One of the big reasons why there is such a divide in the fanbase. Least with the first three, heck, even into the fourth season, you had a stable consistency with the characters. Now, it's staggered... it's hit or miss. It's not stable and it's hurting the show, it may not be clear now but I think down the road, it's gonna show. There is major inconsistencies within the show currently that wasn't there in the pre-movie and it's already caused damage, major damage? Nah. Minor damage, yes.