You just seem to sure.

So I guess I must have done something wrong here.

Still I am convinced I am using the exact same passphrase that I literaly wrote down. I must have made a mistake.

If I installed a client on another android, could I import the adress which has the BURST on it?
If I then tried to use the passphrase would this help? (probably not if I made a typo

)
replenishment:
I tried with an extra space on the end of the passphrase and before the first word. Each time I get a new adress. Does this mean that each time the wallet generates an extra adress? Couldn't it better just alert that you have given the wrong passphrase? I'm just suggesting (and I know that there is still a lot of work to do with this wallet so never mind this noob

)