ESPresense Calibration with Apple Devices

Hey there
Is there someone who can help me with my Calibration for an iPhone and Apple Watches? I use meanwhile 9 Nodes in a Flat with around 90m2 and the results are not really satisfactory. When i sitting still at my desk the devices move around in my room (on the map) like i’m walking around so its very difficult to measure a stable room tracking. For example my light in the room next to my bathroom switch on and off and on while i staying in my bath.
I tried a few times to calibrate my devices but im still not happy. i think i need to fine-tune my ESPresense Settings on my Nodes like RSSI min/max, Distances etc.

Would be great to get some advices…
Just tell me what to post to make a proposal.

Thank in advance!