As others have said, make it simple and have just a single DHCP server on the main router.
I have several additional WAPs on my network - all are routers with DHCP turned off. I can then connect wired or wireless to them and if I move from one wireless connection to another my IP remains.
I have my network set to allocate xxx.xxx.xxx.64 to xxx.xxx.xxx.127 dynamically and on request by PCs, tablets, phones &c. The individual WAPs/slave routers are .160 .170 .180. .190 - easy to remember. Other devices such as printers are given fixed IPs in the .200 to .240 range.
M H C
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