Unity buttons touchscreen woes

I have two buttons for my touchscreen game generated by gui.repeatbutton

Only one button of the two ever needs to be held down at a time

My problem is that sometimes users try to quickly release one and then touch the other.

Often, if they didn't get one of their fingers off of one button before they started to hold down the other one, it won't sense them holding down the second button.

Is there any way to fix this or maybe a function to constantly re-check? Or just take the most recent button touch as the true input?

Thank you!