Weird stuff happening with my credit. Help!

So try to follow.. I bank with chase, and they pre approved me for 5 different credit cards on Friday/saturday.. I filled out an app for one of them and they told me right away that they need to review my application. I finally found the answer and they denied me at this time. In the statement, it says my experian credit score is 573, while my chase app (experian) says it’s 647. On credit karma, equifax and trans union, it’s 647 and 650 respectively. I’m wondering what’s going on? #1, I’m annoyed that chase dangled those cards in front of me after 4+ years just to deny me, and #2, why is my score said to be so low in that statement while my score on the chase app says that’s it’s 647? I did have a collection open recently, and my score on credit karma went down 13 points at the end of January. I’m super confused with all of these different credit sources telling me different things. I’m worried that my score is going to drop to 573 when chase (experian) updates my credit on the 8th of February.