u/No-Adhesiveness7870

I’ve noticed the paint peeling on the inside of the basement door. When I went to look during rain, I can see it’s falling between the gap from the porch above. Could this be the cause and how do I fix it?
Can I create a barrier that goes along the porch above and connect to the side of the house?

I bought my house a couple years ago and noticed these raised lines along the edge of a few rooms on the main floor. The house was built in the 70’s. Curious if you knew what caused it and if it’s something symptomatic of a bigger issue?