Please ID this plant, thanks

I planted this plant from seeds given by a friend in Spain, and I was told that it was cross from colombine and other orange. However, it look different from other tropical hibiscus that:
1. All the plants look the same, I mean the same size of flower and colors. While other topical hibiscus seeds I got from AHS, bloom with different color.
2. This flower appears to be pink in morning, and change to light orange in the afternoon, why is this so?
3. Is this hibiscus rosa sinensis?
4. I have cross with other hibiscus rosa sinensis, it seem that it have high percentage of success in pollination, will the seeds produced, look the same as mother plant, no different in color?

Thanks.

This is how it look in the afternoon.

It looks like rosa-sinensis to me, but since you started it from seed it won't have a cultivar name. You never know what you're going to get when you start things from seed, sometimes you may get things that all look really different from each other and not at all like the parents, sometimes you'll end up with things that look closer. So your seeds may give you babies that look close to your parent plant, or they may not, you'll have to grow them and see what you get.

Thanks, does it mean that the seeds form the same seed pod, may grow up with the same pattern of plant?

I don't think it works that way--no matter what pod they come from some seeds may look like the parents and some may not and they may or may not look like each other. If you've got your heart set on more plants that look like the parents, then cuttings or grafting are the way to go. With seeds like this, you can never know for sure what they're going to look like.

Thanks for the information, last year I planted dinner plate hibiscus, and all the seeds produced, have the same pattern like parents, and later I found that dinner plate is not hibiscus rosa sinensis. That is why I am not sure with this Spain's variety.

Your pictures look like H. rosa-sinensis, that's why I made the comments I made about coming true from seed, etc