Many fillpinas are unemployed when applying so nothing to worry about.
As others said it maybe the system as changed again (everyone used to be interviewwd a few years back then it suddenly changed)
It could be just a random interview is given out i have read of in the recent past a few other ladies being interviewed and all were ok
Keep calm and remeber they can be tough but not nasty if they were then they would be in big problems with their bosses.