It does appear with the correct measurements when i run it. But in C2, it shows as a smaller sprite-preview inside the actual sprite boundaries.
Yup and that is a known bug when you use the windows zoom instead of the C2 zoom.
All I can suggest is you use the C2 zoom and zoom to 100% and then save your game and close it and then shut your cumputer down and restart.
That usuallly fixes it but it may have crashed your graphics card so look at that if the problem persists.
If the sprites don't come back delete them completely from the project and save and then reload them into sprites.