Random Magic ability

[mac5732]

In playing the Pale ones, early era, I noticed that those mages that have a question mark for random magic, that when you ck them it shows the percentage of what you can get, this is usually a possiblity of an increase of magic they already have. In D2, when you would pick them, they would get a random magic path. So far this has not been the case in D3, what I've seen is usually an increase in one of the paths that they already have, or if the percentage is low, they don't get an increase nor do they get another magic path. I looked in the manual to see if this was correct, but so far unable to find an answer. Is this the way its supposed to be or is this a bug? So if this is the case, then Random ? only will be a possible increase in those magic paths that it shows with the percentage. Is this correct? tks for the help

2nd. I also noticed that in one of the neutral sea provinces, have Cavalary. Is this a bug? its a solid sea province, no land.. Seems strange that a sea province would have land cavalry units.. tks for any info