Well Kamara is just a name, it could have been any alternative midfielder, any solid links anyone other than your first choice might make them a bit apprehensive if they're suddenly not seeing themselves as being the number 1 target. It could be anything, everyone is different, that's the awkward thing dealing with people rather products.
There have been several times I've considered other jobs since I started working at my current employer. Sometimes it's just been an interview and I've told them I'm not interested, other times I've gone as far as handing my notice in before being persuaded to stay. Every time I guess I've wasted some of another companies time to some extent by not ending up as their employee. Maybe that's caused them problems if they'd got me earmarked on something in particular and having to change to another candidate has lost them that opportunity. That's life, unfortunately for football clubs they have a very limited window for recruitment so those problems are intensified.
Sure you'll, or someone else, will shout about 'doing it sooner' as the solution but it's not always possible is it, you can always force things to follow your timeline, you push too hard and you might scare the other party away entirely.