Sorting by capture time not working (LR Cloud Based Ipad)

Hi guys, not sure if im just being stupid here but i shot a fight event last weekend and used two cameras:

one for the fight rounds (sony) and another for the decision shots at end of each round (canon)

both camera time and date were accurate. 

when i import to lightroom and select to organise by CAPTURE TIME. It fails to this and instead brings all of the photos of one camera at the top, sorted by capture time then all the photos from 2nd camera organised by time. 

Really frustrating as i need these to be in order of CAPTURE TIME accross the board. 

ive attached a photo to give an example

as you can see the time stamps from the top images go from 14:36 to 14:51 (camera 1)

then jump back and start at 15:58 to 14:06 (camera 2)

Despite selecting "sort by capture time) 

please help