0DTE QQQ credit spread stop limit fills

I got burned today when the stop limit on my 0DTE QQQ credit spreads weren’t met. I was setting my stop trigger as the same value as the stop limit… I guess I need to make the stop trigger different? For example, stop trigger at 1.05 and stop limit at 1.06.

My question is, will that guarantee I at least get filled next time, even if there is some slippage? I just want to make sure that I get a fill because today was a brutal loss when I realized what happened… I don’t know what delta between the stop trigger and limit should be to guarantee a fill, if any….

I trade on TastyTrade. It’s nice that they have limit orders on spreads, but would a market order be the only way to truly guarantee a fill? I understand the slippage there could be greater and TastyTrade doesn’t even offer market stops.