Phalaenopsis with small leaves

[daveh_sf]

I have a Phalaenopsis 'Mount Lip' which is growing strangely. In the last year or so it has put out 9 new leaves, but each of them are less than half the length of the original leaves. It hasn't flowered since this started, so I don't know if the flower will be affected. The leaves otherwise look great, and there's lots of good roots. I repotted it about the same time in clay brick chunks, but I doubt that that is the cause, since I also have other phals potted the same way and they grow normally. Culturally (light, water, temp, etc) it's grown the same as the other phals too. Any ideas what causes this?