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I have the AK90+ software, using AK90+ 3.19 software.  I also have the EWS4 adapter so I don't have to solder wires each time.

I can read the EWS4 fine, I was able to unlock a key and write back to the EWS module.  I was also able to read the data, save the bin, then write the data to a different EWS4 module (effectively cloning it) and it worked... so far so good, BUT, and here's where I'm having a weird problem.

I want to add new keys, I tick 2 boxes that were unused to add the keys.  I write back to EWS, it takes a little while and says "Write OK".  But it doesn't actually do anything... as in, the 2 new keys I added are NOT in fact added.  They are not ticked when I re-read the EWS, and putting the module in the car, only the original keys work (as expected) but not the new ones.  No matter what I do or try, it never "accepts" new keys even though it says "Write OK".

What I can't figure out, is, how come locking/unlocking a "used" key works, how come I can clone the EWS data to a different EWS module -> Proving that the Writing IS writing, and yet it refuses to actually ADD a new key

Has anyone come across this before?

If it makes any difference, the EWS4 module is from a 2008 BMW Z4 E86