If they are in the sun they don't burn instantly or they couldn't even come out on cloudy days. It hurts their skin. I don't know much about the skin sensitivity to the sun.
I have this problem. I can't go out in the sun with anything below SPF40. My skin doesn't tan, it goes straight to burning and blistering. I have scars from this. This isn't a vampiric trait, it's a melatonin issue.
The vampires I've hung around with say that the sun makes them uncomfortable. One even joked, the sun was trying to steal his soul, refering to the fact that most vampires feel like their energy gets zapped from them when they are in the sunlight. It makes them worn out quickly and tends to give them bad headaches, make them cranky. The night makes them feel more at ease, more lively.
I know it sounds crazy but Bast and Jake tell me it's true. They're never wrong. I'm not being fed lies. I know bullshit and this isn't bullshit. If I can't catch it Jake and Bast can. They tell me everything important and even sometimes unimportant things. Like "hey if you don't leave now you'll miss the bus" and I run out the door without looking at the clock..and guess what? I have to run to meet the bus. (My hill is really big so I couldn't have heard the bus). They know when things are happening and they know lies. Jake tells me when people are lying all the time.
I wake up before my alarm clock goes off every day, and it's set for different times everyday because of my work schedule, which varies week to week. This is not the help of anyone, this is just my internal clock. Even though you make not realize it, you now more about what goes on around you as far as bus schedules and things go and your body will react and tell you when you need to leave to catch a bus or to go back and check the stove. It's being intune to your natural instincts.
Now this is where I'm probably going to make you very angry. I've known of spirits and other beings who like to play tricks. There are beings of all types who do this. They will tell you the truth about everything going on around you, but when it comes to something they want from you, they will lie like you wouldn't believe. It's them just being manipulative.
You maybe asking but why would all of these go to a lengths to deceive me? There are beings who do have the power to control lower entities and even create them. Which brings me to:
Real vampires go through a transformation of some kind at night as far as I know. I seen him while astral traveling and my soul sensed the danger so quickly my soul was snapped back in place and I woke up. It made me tired... Point is that I got a glance. He had wings and his nose was turned up, like a gargoyl, his skin was pale grey. That's all I could remember. He looked like a human mixed with a vampire..which is what he is pretty much. A Vampyric Gargoyl.
I'm going to be very honest; reading this and the vibe I got, I'm scared and worried for you. I've had dealings with vampires and vampire friends of mine on the astral plane and have never seen anything like this. I want you to ask yourself: why would I sense danger and run when seeing a friend? Cause a friend is someone who would never want to harm you, so why would this happen. If your astral self is sensing danger there's a reason. This is not a vampire, and you need to tread very carefully. I'm not sure of what it is, but please be careful, I can't stress that enough. I also ask for you to think back to when your dealing with Bast and Jake and your vampire friend all started to happen?
Something is not right here, and while you stated we aren't you and haven't been where you are or know these people, you haven't been where I have or known what I have, but I will tell you that I know a lot about what's out there, what things "bump in the night" so to say and I'm telling you, you need to guard yourself and be trying to figure out what this individual is actually after from you, cause if my suspicions are right, it's not wanting to make your life perfect and full of happiness like you're wanting.