Titebond III on top Titebond II

I got two Gallons of Titebond 2. I am thinking I will need at least two gallons more. There appears to be a shortage of Titebond 2 in Canada right now and ordering online will be $100/Gallon(with duties and shipping). I can get Titebond 3. If do PMF base coat with Titebond 2 can I put Titebond 3 as the second layer, or will it stick to each other? Or can I Mix Titebond 2 and Titebond 3 together make Titebond 2.5 :-)