You could try using the Send to Kindle for PC
software which is available for free from Amazon. It adds another option to the right-click menu and you can even choose which Kindle to send it, if you should own more than one device. You simply select the file you want to send (in your sample it would be the mobi file only, right click and select Send to Kindle.
I use it regularly and find the book on my Kindle within a few seconds.
I cannot recommend it highly enough.