Swimming in water dish?

[ckuhn003]

My baby ball python has been in his water bowl twice already today. This morning he went inside his water bowl and was trying to swim around (it's quite wide). And then I found him going back in there again, but not trying to swim this time. Is this normal?
Also, for the past couple of days he seems to be quite active during the day. But he'll still explore here and there at night. Is this a sign of stress?

He already has two hides in his terrarium. Cool side is 80 degrees. Humidity is 57%. Hot side has been 91-92 degrees.
His feeding day is tomorrow. He did not eat last week.

Anything helps

I'm wondering if it could be mite related which is usually brought up when BPs are found in the water dish on frequent occasions. For the record, I've never found mine in the water dish and almost never active during the day which may be some cause for concern. Your temps seem to be good...humidity a tad bit low.