Yes, the sentence is grammatically correct. It means that the speaker frequently has the habit of going to bed late and consequently waking up very early the next morning.
Here are a few ways to rephrase it:
1. "I've always had a habit of staying up late and waking up very early."
2. "It has consistently been about going to bed late and rising early."
3. "The pattern has always been staying up late and getting up early."
4. "I've always found