That's not how I interpreted Jill's message - here's how I see it:
VCAP5-DCA: at the moment you could pass either the VDCA510 exam or the VDCA550 exam to achieve VCAP5-DCA certification, from February 1st only the VDCA550 exam will be available.
VCAP5-DCD: at the moment you could pass either the VDCD510 exam or the VDCD550 exam to achieve VCAP5-DCD certification, from February 1st only the VDCD550 exam will be available.
But if you already hold the VCAP5-DCA or VCAP-DCD certifications on February 1st, then you hold those certifications...