wierd. check to see how the spring plate engages the baseplate. it shouldn't be coming out like that. if it's one month old, call CZ-USA and they'll make it right. you can also check with angus or CZ-UB or CZ-USA themselves at czforum.com.
and fwiw, CZ gets their mags from Mec-Gar in italy. they are the OE for just about all the big names, including amt, beretta, fn, browning, colt, cz, imi, kimber, naa, remington, sig arms, s&w, springfield armory, sti, tanfolgio, taurus and walther. so, your problem can show up even if you decide to switch gun manufacturers.