Unsellable "enemy" Tristana on my bench.

Sold a Tristana, but instead of selling it changed to being not mine anymore and continued to take up a spot on the bench. Highlighted red instead of green. I was able to put it into play, but once the match started it attacked my side instead of the enemy. Bought a couple more in hopes of it fixing itself when they merged, but on merging it remained an enemy unit.