The slight delay between the readings won't be an issue, but I am a bit concerned about not having them in the same labview exe. The way I currently work it with my one 9188 is to bring the channels in through MAX and then have a DAQmx global channel running each of the channels in the labview program. The end use will have the channels from each module in the same program, likely shown in different tabs in the same exe.
I am not a programmer by any means but was the closest thing available the company had, so I am not very good with this and really only know enough to get by on the current task at hand, so I apologize for the lack of knowledge.