Regarding points 1 and 5 - please contact me via PM and provide me with more information. We'll sort it out.
Regarding points 2, 3&5, the platform and the extruder heat up at the same time. The extruder heats up to 160 Celsius degrees and it's waiting for the bed to reach the required temperature. Once it happens, the extruder heats up again to the target temperature.
Hi Mine is a little more complicated than that. The Bed temperature goes up down as does the extruder temperature. One minute its at 49 degrees then the next it is 43. The % say 33 then eventually, in 1 go, jumps to 79% If you are lucky it eventually starts to print, or decides there is a hot end (brand new Zortrax) problem.