I have entered my 16 words and I have one that is flagged in 'orange' and I am given an alternative option saying that this word doesn't exist in the wordlist. Message is xxxx is not in the worldlist, do you mean xxxx ?
Is the "xxxx" a word and specifically the 16th word of your seed phrase? I'm afraid that the seed phrase was generated with Multibit HD and not with Classic. As NeuroticFish said, in Classic there wasn't such option. Using a single seed to generate addresses was then included in HD
(hierarchical deterministic) which makes much more sense to me now.
Should I keep the word the way I entered it (but I have the orange flag) or should I replace it with the word they suggest which has one letter different (maybe I wrote it wrong in the first place, my hand writing is quite bad...)?
If it flags you a message in that orange frame it means that you've entered something invalid. Is this the message that it returns you?