Follow these instructions to export and post the configurations of both the RB3011 and of the cAP AC:
http://forum.mikrotik.com/t/forum-rules/173010/1
If I may, your current setup seems to me - let’s say - unconventional, and the intended one even more so, maybe there are reasons why you chose this topology (like some particular limitation with cables and placement of the devices), it would be useful if you could state these reasons, as there may be simpler topologies that would reflect as simpler configurations and easier maintenance.
A typical simpler scheme would be:
Internet
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RB3011 ← Main router and dhcp server
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Cap AC ← access point (bridge between cabled lan and wifi)
that could become either:
Internet
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RB3011 as Main router and dhcp server
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Cap AC as access point (bridge between cabled lan and wifi) ↔ 2nd Cap AC as access point (bridge between cabled lan and wifi)
or:
Internet
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RB3011 as main router and dhcp server ↔ 2nd Cap AC as access point (bridge between cabled lan and wifi)
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Cap AC as access point (bridge between cabled lan and wifi)