Past tense vs Present continuous tense

Hi

I recently noticed that (If I'm not mistaken..) the past tense of a verb is sometimes used to describe the things that are going on right now.

Ex.
*(Hi. I'm here to see Ms. A.) A! May naghanap sa iyo.
*(What's your job?) Naghanap ako ng work.
*(Music being played on the radio.) Sinong kumanta nyan?

Does this commonly happen in a daily conversation? Or I just heard them wrong...?


Thanks in advance!