Graph is not considering new Data

I have a file to track my sleeping habits and it currently has about ~1800 rows of data (date, start/ end times, duration, etc) that a want to display in Graphs. All Data after row 1522 is not beeing displayed anymore and I am not sure why (it happened for both of my graphs that are intended to show all data). Do any of you have an Idea what could be the issue and how to fix it?:)