Sounds like a bad batch. I had some Heinz beans this week that were very runny.
I don't refrigerate ketchup so if it gets left in the sun it developes a rancid flavor. You might be detecting this as the extra spice because mine definitely acquires that spice-like character via the vinegar content.
Ketchup is also processed and full of sugar so you could be rejecting it on that basis as well. Aka your body says PLZ no but the brain still says AWW YEA