It's normal- peafowl have moments where they just 'kick their heels'.. getting noisy, playful etc. I think that's one of the many endearing things about them. Especially love it when several engage in a ring-around-the-rosie thing, where they run-hop almost in a circle. Just looks like they're having lots of fun.
The Blue is a male.. I am a bit concerned about the white being so big in comparison(and the tail feathers I can see on that one looks 'male' to me). Adult hens are smaller than adult males.. peafowl are mostly at their full body height by the time they are 7-8 months and certainly by 1 year. Going with their supposed ages, the white should be smaller than him, not bigger.
The other way to sex whites is by looking at their legs and toes- males have long thick legs with rather large but very blunt spurs, and their toes are long and thick looking. Hens have skinnier legs with much shorter and skinnier toes. Usually no spurs, but not rare for hens to have spurs, however hen spurs typically are very skinny and pointy. Compare the white's legs and toes with the blue male. If they seem same or bigger/longer I'd say to suspect it's a white..
If it turns out they're both males, it still is OK to keep them together for couple years. Often males raised together and never separated at all still can live together with no or only a little conflict. An adult white male displaying is one of the most beautiful sights..
