yes and no.... if you only had a single mac on each side of a 2 port share and you had L3/L4 configured you would still see those individual data sessions being split back and forth... If it is a stream such as you would see with a IPTV mcast it will stay on the port it landed on till the stream is pruned and not wanted... The days of this pack based sharing on switches is over. You can try the custom setup and changing the Hash like Stephane says... If you are really looking to load balance and not load share. Load balance is typically a layer 3 function and or done by dedicated piece of hardware designed to load balance the traffic equally across multiple paths vs load share which is single traffic flows are sent down a group of shared connection,
You kind of have to go back to basic network knowledge and understand what is on both sides of your connection and how they request and exchange traffic with each other.