Is LSM303dlhc INT1 active HI and DRDY active LO?
The registers are indeed that way around. In the datasheet (link in question), if you have a look at Table 17, which is on page 23, you will find a full register map, and the ordering of the registers.

For the Accelerometer:



For the Magnetometer



As you can see, the ordering is indeed different for each of the two sensors.