That is a Catalex SD card reader. The older model has a problem sharing the MISO line. The logic level converter may be connected incorrectly. That converter/buffer is a 3-state device that allows the output to go into a high impedance state when the OE (output enable) is HIGH.
On the older Catalex card readers, the OE for the MISO line is connected to ground, so it will never release the MISO line. It cannot be used with other SPI devices.
The newer models, made within the last few months or so, have the OE for the MISO line connected to the CS pin, which does allow the device to release the MISO line when the CS (slave select) is taken HIGH. It can be used with other SPI devices.
edit: Here is the old type schematic. Note the OE on the MISO section is connected to GND. Bad.
I attached the schematic for the new type Catalex card reader. Note the MISO OE line connects to the CS pin.