ketchup vs catsup

ok so when i was in Jr high my friends and i were in Ralph's across the street from school we noticed on one of the aisles the little sign over it that tells you what is on the aisle said catsup ok whatever no problem but on the other side of the sign it said ketchup so that started a debate! what was the correct spelling of the word??

so today i was reading my nutrition book and in one place it spells it one way and another place it spells it a different way if you look on bottles some spell it one way others spell it the other so what's the difference they all taste pretty much the same

so i thought this would be a great thing to look up so i did!

after tons and tons of websites i have found nothing! all i found was that it is merely a difference in spelling so crazy! i guess some countries spell it one way while others spell it another way so i guess my answer will never truly be answered!
So when i tried to spell check this it turned up Catsup is spelled wrong what the heck how does this make any sense???

but while researching all of this i found some other random stuff like google images ketchup art there are some crazy pictures there or watermelon carvings oh my gosh crazy!

oh and did you know that 60% of Americans eat out for lunch at least once a week and 25% of Americans eat out for lunch 5 or more days a week! crazy huh??