It (mobile apps) uses a totally different streaming method. It requests a video file and plays it until there is no more data. I'm not sure what the seek bar behavior is when the file is still being written though.
Look in Blue Iris, camera properties, PTZ/Control tab, Edit presets button. I've seen this data get corrupted before and if it is not showing a Name/value equal to the Button # then the preset would not work.
When opening UI2 in the browser camera's are arranged in 2 rows and 3 columns, not an optimal layout. Is it possible to change the default layout to for example 2 columns and 3 rows?