This is from IOSPE:
A nice miniature plant that likes to be wood mounted and needs warm conditions through the summer growth season but cool to warm and drier in the winter and spring and has clustered, small stems carrying 2 to 3, apical, narrow, persistent leaves and blooms in the later spring and early summer on axillary, short [1 to 2"], raceme that arises from near and at the apex of leafed and leafless canes with up to 4 fragrant flowers. It is found in Vietnam, Laos, Burma and Thailand in evergreen, in semi-deciduous and deciduous dry lowland forests and savana-like woodlands at elevations of 800 to 1550 meters and is found on rocks and small bushes.
This species is similar to D dickasonii and D lamyaiae but this one differs in the smaller flowers with a wider cupped lip and three central keels
A lessening of water and fertilizer is beneficial through the onset of winter but in the last 2 months water should be reduced even more and fertilizer eliminated until new growths arise in the spring.
So I think the blooms are normal this time of year.